Question: Information:  - 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.  - A drummer is a musician who plays drums, which includes a drum kit ("drum set" or "trap set", including cymbals) and accessory-based hardware which includes an assortment of pedals and standing support mechanisms, marching percussion or any musical instrument that is struck within the context of a wide assortment of musical genres. The term percussionist applies to a musician who performs struck musical instruments of numerous diverse shapes, sizes and applications. Most contemporary western ensembles bands for rock, pop, jazz, R&B etc. include a drummer for purposes including timekeeping and embellishing the musical timbre. Most drummers of this particular designation work within the context of a larger contingent (a.k.a. rhythm section) that may also include, keyboard (a percussion instrument) or guitar, auxiliary percussion (often of non western origin) and bass (bass viol or electric). Said ensembles may also include melodic based mallet percussion including: vibraphone, marimba or xylophone. The rhythm section, being the core metronomic foundation with which other melodic instruments, including voices, may present the harmonic/melodic portion of the material.  - ZZ Top's First Album is the debut studio album by the American rock band ZZ Top. It was produced by manager Bill Ham, and was released on January 16, 1971, on London Records. Establishing their attitude and humor, ZZ Top incorporated boogie, hard rock, heavy metal and Southern rock influences into their sound. Thematically, the album is lively, playful and at times brash, filled with the band's personal experiences and sexual innuendos that became central to the group's image. Seeking inspiration from Fleetwood Mac, ZZ Top began recording the album at Robin Hood Studios in Tyler, Texas. Only one single was released from the album and failed to appear on the "Billboard" charts.  - ZZ Top is a rock band formed in 1969 in Houston, Texas. Current members are bassist and lead vocalist Dusty Hill, guitarist and lead vocalist Billy Gibbons (the band's leader, main lyricist and musical arranger), and drummer Frank Beard. One of just a few major label recording groups with the same lineup for more than 45 years, critics and fellow musicians praise ZZ Top for its technical mastery. "As genuine roots musicians, they have few peers," according to former musician, critic and collector Michael "Cub" Coda. "Gibbons is one of America's finest blues guitarists working in the arena rock idiom [...] while Hill and Beard provide the ultimate rhythm section support."  - El Loco is the seventh studio album by the American rock band ZZ Top , released in 1981 . The title means `` The Crazy One '' in Spanish . The band 's guitarist / singer Billy Gibbons has said that the recording of this album was the first time the three members of the band were isolated from one another in the studio , rather than recording simultaneously in the same room . It also foreshadowed ZZ Top 's new wave direction later in the decade , with early experimentations in synthesizer backing on certain tracks . El Loco was produced by Bill Ham and recorded and originally mixed by Terry Manning . The biographer David Blayney explains in his book Sharp Dressed Men that the recording engineer Linden Hudson was involved as a pre-producer on this album . Hudson did not receive credit for engineering the tracks on `` Groovy Little Hippie Pad '' which were used on the final album mix. In 1987 , most of the band 's back catalog received a controversial `` digitally enhanced '' remix treatment for CD release ; however , El Loco did not receive this remix treatment and the original mix of the album has been available on CD since 1987 . On June 3 , 2013 , Gibbons told Joe Bosso of MusicRadar.com that the album was `` a really interesting turning point '' , explaining that the band had `` befriended somebody who would become an influential associate , a guy named Linden Hudson . He was a gifted songwriter and had production skills that were leading the pack at times . He brought some elements to the forefront that helped reshape what ZZ Top were doing , starting in the studio and eventually to the live stage . ( He ) had no fear and was eager to experiment in ways that would frighten most bands . But we followed suit , and the synthesizers started to show up on record . Manufacturers were looking for ways to stimulate sales , and these instruments started appearing on the market . One of our favorite tracks was '' Groovy Little Hippie Pad `` . Right at the very opening , there it is -- the heavy sound of a...  - A book is a set of written, printed, illustrated, or blank sheets, made of paper, parchment, or other materials, fastened together to hinge at one side, with text and/or images printed in ink. A single sheet within a book is a leaf, and each side of a leaf is a page. A set of text-filled or illustrated pages produced in electronic format is known as an electronic book, or e-book.   - Albums of recorded music were developed in the early 20th century, first as books of individual 78rpm records, then from 1948 as vinyl LP records played at  rpm. Vinyl LPs are still issued, though in the 21st century album sales have mostly focused on compact disc (CD) and MP3 formats. The audio cassette was a format used from the late 1970s through to the 1990s alongside vinyl.  - Tres Hombres (Spanish for "three men", referring to the three band members) is the third album by the American rock band ZZ Top. It was released in 1973. The album was the first of many times the band worked with Terry Manning as engineer. It was a successful combination as the release was the band's first commercial breakthrough. In the US, the album entered the top ten while the single "La Grange" reached number 41 on the singles charts (meanwhile, "La Grange" debuted number 33 on the American Top 40 broadcast on June 29, 1974).  - Rio Grande Mud is the second album by the American rock band ZZ Top. It was released in 1972.  - The Moving Sidewalks was an American psychedelic blues rock band, most notable for giving future ZZ Top guitarist, Billy Gibbons, his start in the music business. The band consisted of Gibbons on guitar, Don Summers on bass, Dan Mitchell on drums and Tom Moore on keyboards.  - William Frederick "Billy" Gibbons (born December 16, 1949) is an American musician, singer, songwriter, producer, and actor, best known as the guitarist and lead vocalist of the American rock band ZZ Top. He began his career in the Moving Sidewalks, who recorded "Flash" (1968) and opened four dates for the Jimi Hendrix Experience. Gibbons formed ZZ Top in late 1969 and released "ZZ Top's First Album" in 1971. The albums that followed, "Rio Grande Mud" (1972) and "Tres Hombres" (1973), along with extensive touring, solidified the group's reputation as a hard-rocking power trio.  - A guitarist (or a guitar player) is a person who plays the guitar. Guitarists may play a variety of guitar family instruments such as classical guitars, acoustic guitars, electric guitars, and bass guitars. Some guitarists accompany themselves on the guitar by singing or playing the harmonica.  - MPEG-1 and/or MPEG-2 Audio Layer III, more commonly referred to as MP3, is an audio coding format for digital audio which uses a form of lossy data compression. It is a common audio format for consumer audio streaming or storage, as well as a de facto standard of digital audio compression for the transfer and playback of music on most digital audio players and computing devices.  - Compact disc (CD) is a digital optical disc data storage format released in 1982 and co-developed by Philips and Sony. The format was originally developed to store and play only sound recordings but was later adapted for storage of data (CD-ROM). Several other formats were further derived from these, including write-once audio and data storage (CD-R), rewritable media (CD-RW), Video Compact Disc (VCD), Super Video Compact Disc (SVCD), Photo CD, PictureCD, CD-i, and Enhanced Music CD. Audio CD players have been commercially available since October 1982, when the first commercially available CD player was released in Japan.  - The lead vocalist, lead vocals or lead singer in popular music is typically the member of a group or band whose voice is the most prominent in a performance where multiple voices may be heard. The lead singer either leads the vocal ensemble, or sets against the ensemble as the dominant sound. In vocal group performances, notably in soul and gospel music, and early rock and roll, the lead vocalist takes the main vocal part, with a chorus provided by other group members as backing vocalists.  - Joseph Michael "Dusty" Hill (born May 19, 1949) is the bassist, keyboardist, and co-vocalist with the American rock group ZZ Top.  - Texas is the second largest state in the United States by both area and population. Geographically located in the south central part of the country, Texas shares borders with the U.S. states of Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the west, and the Mexican states of Chihuahua, Coahuila, Nuevo León, and Tamaulipas to the southwest, while the Gulf of Mexico is to the southeast.  - James Marshall "Jimi" Hendrix (born Johnny Allen Hendrix; November 27, 1942  September 18, 1970) was an American rock guitarist, singer, and songwriter. Although his mainstream career spanned only four years, he is widely regarded as one of the most influential electric guitarists in the history of popular music, and one of the most celebrated musicians of the 20th century. The Rock and Roll Hall of Fame describes him as "arguably the greatest instrumentalist in the history of rock music".  - A bassist, or bass player, is a musician who plays a bass instrument such as a double bass, bass guitar, keyboard bass or a low brass instrument such as a tuba or sousaphone. Different musical genres tend to be associated with one or more of these instruments. Since the 1960s, the electric bass has been the standard bass instrument for funk, R&B, soul music, rock and roll, reggae, jazz fusion, heavy metal, country and pop music. The double bass is the standard bass instrument for classical music, bluegrass, rockabilly, and most genres of jazz. Low brass instruments such as the tuba or sousaphone are the standard bass instrument in Dixieland and New Orleans-style jazz bands.  - The LP (from "long playing" or "long play") is an analog sound storage medium, a vinyl record format characterized by a speed of rpm, a 12 or 10 inch (30 or 25 cm) diameter, and use of the "microgroove" groove specification. Introduced by Columbia in 1948, it was soon adopted as a new standard by the entire record industry. Apart from a few relatively minor refinements and the important later addition of stereophonic sound, it has remained the standard format for vinyl albums.  - Houston is the most populous city in Texas and the fourth-most populous city in the United States after Chicago, located in Southeast Texas near the Gulf of Mexico. With a census-estimated 2014 population of 2.239 million within an area of , it also is the largest city in the Southern United States, as well as the seat of Harris County. It is the principal city of HoustonThe WoodlandsSugar Land, which is the fifth-most populated metropolitan area in the United States of America.    After reading the paragraphs above, we are interested in knowing the entity with which 'el loco' exhibits the relationship of 'genre'. Find the answer from the choices below.  Choices: - album  - arena  - baroque  - blues  - blues rock  - book  - country  - dixieland  - family  - funk  - heavy metal  - history  - james  - jazz  - mud  - music  - musical  - percussion  - play  - pop  - popular music  - reggae  - renaissance  - rock  - rock music  - southern rock  - united states of america  - variety  - video
Answer:
blues rock