Answer the following question: Information:  - Michael Stephen "Mike" Portnoy (born April 20, 1967) is an American drummer primarily known as the former drummer, backing vocalist, and a co-founder of the progressive metal/rock band Dream Theater. Known for his technical skill as a drummer, Portnoy has won 30 awards from the "Modern Drummer" magazine. He co-produced six Dream Theater albums with guitarist John Petrucci, starting from "" through "Black Clouds and Silver Linings". From "A Change of Seasons" onwards, Portnoy had been writing a significant amount of Dream Theater's lyrics. He is the second youngest person (after Neil Peart) to be inducted into the "Modern Drummer's" "Hall of Fame", at 37 years of age.  - Stockholm (or ) is the capital of Sweden and the most populous city in the Nordic countries; 932,917 people live in the municipality, approximately 1.5 million in the urban area, and 2.3 million in the metropolitan area. The city is spread across 14 islands on the coast in the southeast of Sweden at the mouth of Lake Mälaren, by the Stockholm archipelago and the Baltic Sea. The area has been settled since the Stone Age, in the 6th millennium BC, and was founded as a city in 1252 by a Swedish statesman Birger Jarl. It is also the capital of Stockholm County.  - A unitary state is a state governed as a single power in which the central government is ultimately supreme and any administrative divisions (sub-national units) exercise only the powers that the central government chooses to delegate. The majority of states in the world have a unitary system of government. Of the 193 UN member states, 165 of them are governed as unitary states.  - John Peter Petrucci (born July 12, 1967) is an American guitarist, composer and producer. He is best known as a founding member of the progressive metal band Dream Theater. With his former bandmate Mike Portnoy, he has produced all Dream Theater albums from 1999's "" to 2009's "Black Clouds & Silver Linings", and has been the sole producer of the band's albums released since Portnoy's departure in 2010. Petrucci was named as the third player on the G3 tour six times, more than any other invited guitarist. Joel McIver's 2009 book "The 100 Greatest Metal Guitarists" ranks Petrucci second, after Dave Mustaine. He was also named as one of the "Top 10 Greatest Guitar Shredders of All Time" by "GuitarOne" magazine. In 2012, Petrucci was ranked the 17th greatest guitarist of all time by a "Guitar World" magazine reader's poll.  - Slovakia, officially the Slovak Republic, is a landlocked country in Central Europe. It is bordered by the Czech Republic and Austria to the west, Poland to the north, Ukraine to the east and Hungary to the south. Slovakia's territory spans about and is mostly mountainous. The population is over 5 million and comprises mostly ethnic Slovaks. The capital and largest city is Bratislava. The official language is Slovak, a member of the Slavic language family.  - Wrocaw (, ; ) is the largest city in western Poland. It is on the River Oder in the Silesian Lowlands of Central Europe, roughly 350 kilometres (220 mi) from the Baltic Sea to the north and 40 kilometres (25 mi) from the Sudeten Mountains to the south. Wrocaw is the historical capital of Silesia and Lower Silesia. Today, it is the capital of the Lower Silesian Voivodeship. At various times in history, it has been part of the Kingdom of Poland, Bohemia, Hungary, the Austrian Empire, Prussia and Germany. It became part of Poland in 1945, as a result of the border changes after the Second World War. The population of Wrocaw in 2016 was 637,075 making it the fourth-largest city in Poland and the main city of Wrocaw agglomeration.  - Massachusetts ; officially the Commonwealth of Massachusetts, is the most populous state in the New England region of the northeastern United States. It is bordered by the Atlantic Ocean to the east, the states of Connecticut and Rhode Island to the south, New Hampshire and Vermont to the north, and New York to the west. The state is named for the Massachusett tribe, which once inhabited the area. The capital of Massachusetts and the most populous city in New England is Boston. Over 80% of Massachusetts' population lives in the Greater Boston metropolitan area, a region influential upon American history, academia, and industry. Originally dependent on agriculture, fishing and trade, Massachusetts was transformed into a manufacturing center during the Industrial Revolution. During the 20th century, Massachusetts' economy shifted from manufacturing to services. Modern Massachusetts is a global leader in biotechnology, engineering, higher education, finance, and maritime trade.  - Blackwater Park is the fifth studio album by Swedish band Opeth. It was released on February 27, 2001, through Music for Nations and Koch Records. The album marks the first collaboration between Porcupine Tree frontman Steven Wilson and the band, as Wilson had been brought in to produce the album, which led to a considerable shift in Opeth's musical style.  - Belarus ( lat. ', ), officially the Republic of Belarus, formerly known by its Russian name Byelorussia (though this name is no longer used in Belarus itself, even in Russian language), is a landlocked country in Eastern Europe bordered by Russia to the northeast, Ukraine to the south, Poland to the west, and Lithuania and Latvia to the northwest. Its capital and most populous city is Minsk. Over 40% of its is forested. Its strongest economic sectors are service industries and manufacturing. Until the 20th century, different states at various times controlled the lands of modern-day Belarus, including the Principality of Polotsk (11th to 14th centuries), the Grand Duchy of Lithuania, the PolishLithuanian Commonwealth, and the Russian Empire.  - Lunatic Soul is a progressive rock side-project founded by Riverside vocalist and bass guitarist Mariusz Duda in 2008.  - Berklee College of Music, located in Boston, Massachusetts, United States, is the largest independent college of contemporary music in the world. Known for the study of jazz and modern American music, it also offers college-level courses in a wide range of contemporary and historic styles, including rock, flamenco, hip hop, reggae, salsa, and bluegrass. , Berklee alumni have been awarded a total of 266 Grammy Awards. Since 2012, Berklee College of Music has also operated a campus in Valencia, Spain.  - Progressive metal (sometimes known as prog metal or technical metal) is a fusion genre melding heavy metal and progressive rock which combines the loud "aggression" and amplified guitar-driven sound of the former with the more experimental, cerebral or "pseudo-classical" compositions of the latter. Whilst the genre emerged towards the late-1980s, it was not until the 1990s that progressive metal achieved commercial success. Dream Theater, Queensrÿche, Tool, Symphony X and Fates Warning are a few examples of progressive metal bands who achieved commercial success; additionally, many other thrash and death metal bands started to incorporate elements of progressive music in their work. Progressive metal's popularity started to decline towards the end of the 1990s, but it still remains a largely diffused underground genre with a committed fan base.  - The guitar is a musical instrument classified as a string instrument with anywhere from four to 18 strings, usually having six. The sound is projected either acoustically, using a hollow wooden or plastic and wood box (for an acoustic guitar), or through electrical amplifier and a speaker (for an electric guitar). It is typically played by strumming or plucking the strings with the fingers, thumb and/or fingernails of the right hand or with a pick while fretting (or pressing against the frets) the strings with the fingers of the left hand. The guitar is a type of chordophone, traditionally constructed from wood and strung with either gut, nylon or steel strings and distinguished from other chordophones by its construction and tuning. The modern guitar was preceded by the gittern, the vihuela, the four-course Renaissance guitar, and the five-course baroque guitar, all of which contributed to the development of the modern six-string instrument.  - Opeth is a Swedish heavy metal band from Stockholm, formed in 1989. The group has been through several personnel changes, but singer, guitarist and songwriter Mikael Åkerfeldt has remained Opeth's primary driving force throughout the years. Opeth has consistently incorporated progressive, folk, blues, classical and jazz influences into its usually lengthy compositions, as well as strong influences from death metal, especially in their early works. Many songs include acoustic guitar passages and strong dynamic shifts, as well as both death growls and clean vocals. Opeth is also well known for their incorporation of Mellotrons in their work. Opeth rarely made live appearances supporting their first four albums; but since conducting their first world tour after the 2001 release of "Blackwater Park", they have led several major world tours.  - Indukti is a progressive metal band from Poland, founded in 1999. Indukti's debut album, "S.U.S.A.R.", featured Mariusz Duda of the Polish band Riverside on vocals.  - Kraków, also Cracow or Krakow, is the second largest and one of the oldest cities in Poland. Situated on the Vistula River in the Lesser Poland region, the city dates back to the 7th century. Kraków has traditionally been one of the leading centres of Polish academic, cultural, and artistic life and is one of Poland's most important economic hubs. It was the capital of the Crown of the Kingdom of Poland from 1038 to 1569; the PolishLithuanian Commonwealth from 1569 to 1795; the Free City of Kraków from 1815 to 1846; the Grand Duchy of Cracow from 1846 to 1918; and Kraków Voivodeship from the 14th century to 1998. It has been the capital of Lesser Poland Voivodeship since 1999.  - Steven John Wilson (born 3 November 1967) is an English musician and record producer, most associated with the progressive rock genre. Currently a solo artist, he became known as the founder, lead guitarist, singer, and songwriter of the band Porcupine Tree, as well as being a member of several other bands. He has also worked with artists such as Opeth, King Crimson, Pendulum, Jethro Tull, XTC, Yes, Marillion, Tears For Fears, Roxy Music, and Anathema.  - Deantoni Parks (born ) is an American new wave/avant-garde/experimental drummer, songwriter, film director, actor and record producer. He is the founder, producer and drummer of the New York band KUDU, and one-half of the writing duo Dark Angels with producer and keyboardist Nick Kasper, also a member of KUDU. He was a member of progressive rock band The Mars Volta, and is currently a member (together with Kasper) of the alternative rock band Bosnian Rainbows.  - Mariusz Duda (born 25 September 1975) is a Polish musician and composer best known as the bassist and vocalist in the band Riverside. He is also a former member of Xanadu and did guest vocals for Indukti's album S.U.S.A.R. He released his debut solo album under the moniker Lunatic Soul on the Kscope label in October 2008. Mariusz released his second album under the name of Lunatic Soul in October 2010. Both albums are known for the absence of an electric guitar.  - Jazz is a music genre that originated amongst African Americans in New Orleans, United States, in the late 19th and early 20th centuries. Since the 1920s jazz age, jazz has become recognized as a major form of musical expression. It emerged in the form of independent traditional and popular musical styles, all linked by the common bonds of African American and European American musical parentage with a performance orientation. Jazz is characterized by swing and blue notes, call and response vocals, polyrhythms and improvisation. Jazz has roots in West African cultural and musical expression, and in African-American music traditions including blues and ragtime, as well as European military band music. Although the foundation of jazz is deeply rooted within the Black experience of the United States, different cultures have contributed their own experience and styles to the art form as well. Intellectuals around the world have hailed jazz as "one of America's original art forms".  - Lars Mikael Åkerfeldt (born 17 April 1974) is a Swedish musician, prominently known as the lead vocalist, guitarist, and primary songwriter of progressive death metal band Opeth, as well as being the former vocalist of death metal supergroup Bloodbath. He was also guitarist for the "one-off" band Steel, and is part of the collaboration Storm Corrosion with Steven Wilson.  - Central Europe lies between Eastern Europe and Western Europe. The concept of Central Europe is based on a common historical, social and cultural identity. Central Europe is going through a phase of "strategic awakening", with initiatives such as the CEI, Centrope or V4. While the region's economy shows high disparities with regard to income, all Central European countries are listed by the Human Development Index as very highly developed.  - Mike Mangini (born April 18, 1963) is an American drummer. Since 2010, he has been a member of progressive metal band Dream Theater, following the departure of founding drummer Mike Portnoy. He has also played for bands and artists such as Annihilator, Extreme, James LaBrie, and Steve Vai. Before joining Dream Theater, Mangini was a faculty member at Berklee College of Music. Between 2002 and 2005, he set five World's Fastest Drummer records. Mangini appeared on the Discovery Channel show "Time Warp", displaying his drum skills for high speed cameras.   - El Paso (; from Spanish, "the pass") is the county seat of El Paso County, Texas, United States. The city is situated in the far western corner of the state of Texas.  - Omar Alfredo Rodríguez-López (born September 1, 1975) is a multi-instrumentalist, songwriter, producer, writer, actor and film director who was born in Bayamón, Puerto Rico. He is best known for being the guitarist and band-leader of The Mars Volta from 2001 until their breakup in 2012, and is currently the guitarist for the alternative rock groups At the Drive-In, Antemasque and Bosnian Rainbows. He was also the bassist for the dub band De Facto. He has embarked on a solo career, both in studio and in concert, frequently described as experimental, avant-garde and/or progressive. He has collaborated with numerous artists spanning from John Frusciante to El-P.  - Colin Edwin is an Australian progressive rock musician. Since December 1993 he has been a member of the British band Porcupine Tree, where he plays both fretted and fretless bass guitar as well as double bass and guimbri. Edwin is also a member of Ex-Wise Heads, a long running collaboration with multi instrumentalist Geoff Leigh mixing ethnic, ambient, and post-modern influences, as well as a metal-influenced project, Random Noise Generator and the band Metallic Taste of Blood.  - Marcellus (Marcel) Rodríguez-López (born September 29, 1983) is a multi-instrumentalist musician and younger brother of Omar Rodríguez-López. He is best known as the keyboardist and percussionist of The Mars Volta and the drummer for Zechs Marquise. He also produces electronic music under the moniker Eureka the Butcher.  - S.U.S.A.R. is the first full-length album by the band Indukti. The album was originally released by OFF Music on September 20, 2004, and was re-released by The Laser's Edge on September 6, 2005. On November 17, 2013, Sunspot Records released S.U.S.A.R for the first time on 180g vinyl. The LP was cut at half-speed by Stan Ricker. The title abbreviation comes from medicine and means "Suspected Unexpected Serious Adverse Reaction" The album is partly inspired by the film "Metropolis" by Fritz Lang.  - The European Union (EU) is a political and economic union of member states that are located primarily in Europe. It has an area of , and an estimated population of over 510 million. The EU has developed an internal single market through a standardised system of laws that apply in all member states. EU policies aim to ensure the free movement of people, goods, services, and capital within the internal market, enact legislation in justice and home affairs, and maintain common policies on trade, agriculture, fisheries, and regional development. Within the Schengen Area, passport controls have been abolished. A monetary union was established in 1999 and came into full force in 2002, and is composed of 19 EU member states which use the euro currency.  - Warsaw (; see also other names) is the capital and largest city of Poland. It stands on the Vistula River in east-central Poland, roughly from the Baltic Sea and from the Carpathian Mountains. Its population is estimated at 1.750 million residents within a greater metropolitan area of 3.105 million residents, which makes Warsaw the 9th most-populous capital city in the European Union. The city limits cover , while the metropolitan area covers .  - Psychedelic music (sometimes psychedelia) covers a range of popular music styles and genres influenced by the 1960s psychedelic culture, a subculture of people who used psychedelic drugs such as LSD, psilocybin mushrooms, mescaline and DMT to experience visual and auditory hallucinations, synesthesia and altered states of consciousness. Psychedelic music attempted to replicate the hallucinogenic experience of using these drugs or enhance the experience of using them. Psychedelic music emerged during the mid-1960s among folk rock and blues rock bands in the United States and Britain.  - A concept album is an album unified by a larger purpose or meaning to the album collectively than to its tracks individually. This may be achieved through a single central narrative or theme, or through a sense of artistic cohesiveness. The scope and definition of a "concept album" varies, and there is no consensus over what exactly the term constitutes.  - Blues is a genre and musical form originated by African Americans in the Deep South of the United States around the end of the 19th century. The genre developed from roots in African musical traditions, African-American work songs and European-American folk music. Blues incorporated spirituals, work songs, field hollers, shouts, chants, and rhymed simple narrative ballads. The blues form, ubiquitous in jazz, rhythm and blues and rock and roll, is characterized by the call-and-response pattern, the blues scale and specific chord progressions, of which the twelve-bar blues is the most common. Blue notes (or "worried notes"), usually thirds or fifths flattened in pitch, are also an essential part of the sound. Blues shuffles or walking bass reinforce the trance-like rhythm and form a repetitive effect known as the groove.  - Dream Theater is an American progressive metal band formed in 1985 under the name Majesty by John Petrucci, John Myung, and Mike Portnoy while they attended Berklee College of Music in Boston, Massachusetts. They subsequently dropped out of their studies to concentrate further on the band that would ultimately become Dream Theater. Though a number of lineup changes followed, the three original members remained together along with James LaBrie and Jordan Rudess until September 8, 2010, when Portnoy left the band. In October 2010, the band held auditions for a drummer to replace Portnoy. Mike Mangini was announced as the new permanent drummer on April 29, 2011.  - Jordan Rudess (born Jordan Charles Rudes; November 4, 1956) is an American keyboardist and composer best known as a member of the progressive metal/rock band Dream Theater and the progressive rock supergroup Liquid Tension Experiment.  - Ukraine (tr. ) is a sovereign state in Eastern Europe, bordered by Russia to the east and northeast, Belarus to the northwest, Poland and Slovakia to the west, Hungary, Romania, and Moldova to the southwest, and the Black Sea and Sea of Azov to the south and southeast, respectively. Ukraine is currently in territorial dispute with Russia over the Crimean Peninsula which Russia annexed in 2014 but which Ukraine and most of the international community recognise as Ukrainian. Including Crimea, Ukraine has an area of , making it the largest country entirely within Europe and the 46th largest country in the world. It has a population of about 44.5 million, making it the 32nd most populous country in the world.  - The Mars Volta was an American rock band from El Paso, Texas, formed in 2001. The band's final lineup consisted of Omar Rodríguez-López (guitar, producer, direction), Cedric Bixler-Zavala (vocals, lyrics), Juan Alderete (bass), Marcel Rodríguez-López (keyboards, percussion) and Deantoni Parks (drums). The band formed following the break-up of Rodríguez-López and Bixler-Zavala's previous band, At the Drive-In. They are known for their energetic live shows and their concept albums.  - Kscope is an independent record label that is part of Snapper Music, and a sister-label of Peaceville. It is dedicated to artists in the progressive rock genre. The label has released albums by Steven Wilson and his projects Porcupine Tree, No-Man and Blackfield. In 2008 it branched out and has since signed the post-progressive artists Anathema, Lunatic Soul and Ulver, and progressive rock stalwart Ian Anderson to their roster. In 2013, the Steven Wilson release The Raven That Refused To Sing (and Other Stories) received the Album of the Year award at the Progressive Music Awards.  - John Ro Myung (born January 24, 1967) is a Korean-American bassist and a founding member of the progressive metal group Dream Theater. He is one of the two longest-serving members of Dream Theater along with John Petrucci.  - Kevin James LaBrie (born May 5, 1963) is a Canadian vocalist and songwriter, who is best known as the lead singer of the American progressive metal band Dream Theater.  - Gdask (German: ) is a Polish city on the Baltic coast. It is the capital of the Pomeranian Voivodeship, Poland's principal seaport and is also the centre of the country's fourth-largest metropolitan area.  - Poland, officially the Republic of Poland, is a country in Central Europe, situated between the Baltic Sea in the north and two mountain ranges (the Sudetes and Carpathian Mountains) in the south. Bordered by Germany to the west; the Czech Republic and Slovakia to the south; Ukraine and Belarus to the east; and the Baltic Sea, Kaliningrad Oblast (a Russian exclave) and Lithuania to the north. The total area of Poland is , making it the 69th largest country in the world and the 9th largest in Europe. With a population of over 38.5 million people, Poland is the 34th most populous country in the world, the 8th most populous country in Europe and the sixth most populous member of the European Union. Poland is a unitary state divided into 16 administrative subdivisions, and its capital and largest city is Warsaw. Other metropolises include Kraków, Wrocaw, Pozna, Gdask and Szczecin.  - Cedric Bixler-Zavala (born November 4, 1974 in Redwood City, California) is a Grammy Awardwinning American musician known for his work as frontman and lyricist of the progressive rock band The Mars Volta, and as frontman and occasional guitarist of the post-hardcore group At the Drive-In. Currently he is a singer in the band Antemasque, and also sings and plays guitar in his band Zavalaz. He has also played drums for a number of acts, including the dub act De Facto and more recently Big Sir and Anywhere.  - Porcupine Tree were an English rock band formed by musician Steven Wilson in 1987. The band began essentially as a solo project for Wilson, who created all of the band's music. However, by 1993, Wilson desired to work in a band environment, and so brought on frequent collaborators Richard Barbieri on keyboards, Colin Edwin on bass and Chris Maitland on drums as permanent band members. With Wilson still in charge of guitar and lead vocals, this would remain the lineup until 2001, when the band recruited Gavin Harrison to replace Maitland on drums.  - Pink Floyd were an English rock band formed in London. They achieved international acclaim with their progressive and psychedelic music. Distinguished by their use of philosophical lyrics, sonic experimentation, extended compositions and elaborate live shows, they are one of the most commercially successful and influential groups in the history of popular music.  - Boston (pronounced ) is the capital and most populous city of the Commonwealth of Massachusetts in the United States. Boston is also the seat of Suffolk County, although the county government was disbanded on July 1, 1999. The city proper covers with an estimated population of 667,137 in 2015, making it the largest city in New England and the 23rd most populous city in the United States. The city is the economic and cultural anchor of a substantially larger metropolitan area known as Greater Boston, a Metropolitan Statistical Area (MSA) home to a census-estimated 4.7 million people in 2014 and ranking as the tenth-largest such area in the country. Alternately, as a Combined Statistical Area (CSA), this wider commuting region is home to some 8.1 million people, making it the sixth-largest as such in the United States.  - Pozna (known also by other historical names) is a city on the Warta river in west-central Poland, in the Greater Poland region. It is best known for its renaissance Old Town, destroyed during World War II and then rebuilt, and Ostrów Tumski Cathedral. Today, Pozna is an important cultural and business centre and one of Poland's most populous regions with many regional customs such as Jarmark witojaski, traditional Saint Martin's croissants and a local dialect.  - Riverside is a rock band from Warsaw , Poland . It was founded in 2001 by friends Mariusz Duda , Piotr Grudziski , Piotr Kozieradzki and Jacek Melnicki , who shared a love for progressive rock and heavy metal . Riverside can be described as a blend of atmospheric rock and metal elements , resulting in a sound similar to that of Pink Floyd , Porcupine Tree , The Mars Volta , Opeth , Dream Theater , and Tool , while still maintaining an identity of their own .  - Richard Barbieri (born 30 November 1957, in London, England) is an English synthesizer player, keyboardist and composer. Originally coming to prominence in the late-1970s and early-1980s as a member of new wave pioneers Japan (and their brief 19891990 reincarnation as Rain Tree Crow), more recently he is known as the keyboard player in the progressive rock band Porcupine Tree, of which he has been a member since 1993.  - Death metal is an extreme subgenre of heavy metal music. It typically employs heavily distorted and low-tuned guitars, played with techniques such as palm muting and tremolo picking, deep growling vocals and screams, aggressive, powerful drumming featuring double kick or blast beat techniques, minor keys or atonality, abrupt tempo, key, and time signature changes and chromatic chord progressions. The lyrical themes of death metal may invoke slasher film-stylized violence, religion (sometimes Satanism), occultism, Lovecraftian horror, nature, mysticism, mythology, philosophy, science fiction, and politics, and they may describe extreme acts, including mutilation, dissection, torture, rape, cannibalism, and necrophilia.  - Gavin Harrison (born in May 28, 1963) is an English drummer and percussionist. He is best known for playing with the British progressive rock bands Porcupine Tree and King Crimson. His influences come from his father's jazz collection and from drummers such as Steve Gadd and Jeff Porcaro.  - Lithuania (UK and US: ), officially the Republic of Lithuania, is a country in Northern Europe. One of the three Baltic states, it is situated along the southeastern shore of the Baltic Sea, to the east of Sweden and Denmark. It is bordered by Latvia to the north, Belarus to the east and south, Poland to the south, and Kaliningrad Oblast (a Russian exclave) to the southwest. Lithuania has an estimated population of 2.9 million people , and its capital and largest city is Vilnius. Lithuanians are a Baltic people. The official language, Lithuanian, along with Latvian, is one of only two living languages in the Baltic branch of the Indo-European language family.    What entity does 'riverside ' has the relation 'genre' with?
Answer:
progressive metal