Please answer the following question: Information:  - A record producer or music producer oversees and manages the sound recording and production of a band or performer's music, which may range from recording one song to recording a lengthy concept album. A producer has many roles during the recording process. The roles of a producer vary. He or she may gather musical ideas for the project, collaborate with the artists to select cover tunes or original songs by the artist/group, work with artists and help them to improve their songs, lyrics or arrangements.   - Multimedia is content that uses a combination of different content forms such as text, audio, images, animations, video and interactive content. Multimedia contrasts with media that use only rudimentary computer displays such as text-only or traditional forms of printed or hand-produced material.  - Structural film was an experimental film movement prominent in the US in the 1960s and which developed into the Structural/materialist films in the UK in the 1970s.  - In music, serialism is a method or technique of composition that uses a series of values to manipulate different musical elements. Serialism began primarily with Arnold Schoenberg's twelve-tone technique, though some of his contemporaries were also working to establish serialism as a form of post-tonal thinking. Twelve-tone technique orders the twelve notes of the chromatic scale, forming a row or series and providing a unifying basis for a composition's melody, harmony, structural progressions, and variations. Other types of serialism also work with sets, collections of objects, but not necessarily with fixed-order series, and extend the technique to other musical dimensions (often called "parameters"), such as duration, dynamics, and timbre. The idea of serialism is also applied in various ways in the visual arts, design, and architecture, and the musical concept has also been adopted in literature .  - 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".  - The Velvet Underground was an American rock band from New York City, active between 1964 and 1973. Formed by singer/guitarist Lou Reed, multi-instrumentalist John Cale, guitarist Sterling Morrison, and drummer Angus Maclise (who was replaced by Maureen Tucker in 1965), the group was briefly managed by the pop artist Andy Warhol, and served as the house band at the Factory and Warhol's "Exploding Plastic Inevitable" events from 1966 to 1967. Despite achieving little commercial success during its existence, the Velvet Underground is now recognized as among the most influential bands of all time for its integration of rock music with the avant-garde.   - Drone music, drone-based music, or simply drone, is a minimal music genre that emphasizes the use of sustained or repeated sounds, notes, or tone-clusters  called drones. It is typically characterized by lengthy audio programs with relatively slight harmonic variations throughout each piece. La Monte Young, one of its 1960s originators, defined it in 2000 as "the sustained tone branch of minimalism".  - Downtown music is a subdivision of American music, closely related to experimental music. The scene the term describes began in 1960, when Yoko Ono, one of the early Fluxus artists, opened her loft at 112 Chambers Street to be used as a performance space for a series curated by La Monte Young and Richard Maxfield. Prior to this, most classical music performances in New York City occurred "uptown" around the areas that the Juilliard School at Lincoln Center and Columbia University would soon occupy. Ono's gesture led to a new performance tradition of informal performances in nontraditional venues such as lofts and converted industrial spaces, involving music much more experimental than that of the more conventional modern classical series Uptown. Spaces in Manhattan that supported Downtown music from the 1960s on included the Judson Memorial Church, The Kitchen, Experimental Intermedia, Roulette, the Knitting Factory, Dance Theater Workshop, Tonic, the Gas Station, the Paula Cooper Gallery, and others. Brooklyn Academy of Music has also shown a predilection for composers from the Downtown scene.  - Anthony Schmalz "Tony" Conrad (March 7, 1940  April 9, 2016) was an American avant-garde video artist, experimental filmmaker, musician, composer, sound artist, teacher, and writer. Active in a variety of media since the early 1960s, he was a pioneer of both structural film and drone music. He performed and collaborated with a wide range of artists over the course of his career, most prominently the 1960s New York experimental music collective Theatre of Eternal Music, also known as The Dream Syndicate.  - Inside the Dream Syndicate , Vol. I : Day of Niagara or simply Day of Niagara is a 1965 album by the minimalist music group the Theatre of Eternal Music , aka the Dream Syndicate . Contributors include future Velvet Underground bassist John Cale , original Velvet Underground drummer Angus Maclise , composers La Monte Young and Tony Conrad , and Marian Zazeela .  - A poet is a person who writes poetry. Poets may describe themselves as such or be described as such by others. A poet may simply be a writer of poetry, or may perform their art to an audience.  - John Davies Cale, OBE (born 9 March 1942) is a Welsh musician, composer, singer-songwriter and record producer who was a founding member of the American experimental rock band the Velvet Underground.  - The City of New York, often called New York City or simply New York, is the most populous city in the United States. With an estimated 2015 population of 8,550,405 distributed over a land area of just , New York City is also the most densely populated major city in the United States. Located at the southern tip of the state of New York, the city is the center of the New York metropolitan area, one of the most populous urban agglomerations in the world. A global power city, New York City exerts a significant impact upon commerce, finance, media, art, fashion, research, technology, education, and entertainment, its fast pace defining the term "New York minute". Home to the headquarters of the United Nations, New York is an important center for international diplomacy and has been described as the cultural and financial capital of the world.  - The avant-garde (from French, "advance guard" or "vanguard", literally "fore-guard") are people or works that are experimental, radical, or unorthodox, with respect to art, culture, and society. It may be characterized by nontraditional, aesthetic innovation and initial unacceptability, and it may offer a critique of the relationship between producer and consumer.  - Fluxus is an international and interdisciplinary group of artists, composers, designers and poets that took shape in the 1960s and 1970s. Dutch gallerist and art critic Harry Ruhé describes Fluxus as "the most radical and experimental art movement of the sixties". Fluxus is known for experimental contributions to different artistic media and disciplines. Fluxus is also known for generating art forms that were new when Fluxus artists created them. These art forms include intermedia, a term coined by Fluxus artist Dick Higgins, concept art, first developed by sometime Fluxus artist Henry Flynt, video art, first pioneered by Nam June Paik and Wolf Vostell.  - Video art is an art form which relies on moving pictures in a visual and audio medium. Video art came into existence during the late 1960s and early 1970s as new consumer video technology became available outside corporate broadcasting. Video art can take many forms: recordings that are broadcast; installations viewed in galleries or museums; works streamed online, distributed as video tapes, or DVDs; and performances which may incorporate one or more television sets, video monitors, and projections, displaying live or recorded images and sounds;.  - La Monte Thornton Young (born October 14, 1935) is an American avant-garde composer, musician, and artist generally recognized as the first minimalist composer. His works are cited as notable examples of post-war experimental and contemporary music, and were tied to New York's downtown music and Fluxus art scenes. Initially inspired by sources such as Indian classical music, serialism, and jazz, Young is perhaps best known for his pioneering work in Western drone music (originally referred to as "dream music"), prominently explored in the 1960s with the experimental music collective the Theatre of Eternal Music. He has engaged in musical and multimedia collaborations with a wide range of artists, including Tony Conrad, Pandit Pran Nath, John Cale, Terry Riley, and visual artist Marian Zazeela, with whom he developed the "Dream House" sound and light installation.  - Marian Zazeela (born April 15, 1940) is a light-artist, designer, painter and musician based in New York City. She was a member of the 1960s New York experimental music collective Theatre of Eternal Music, and is known for her collaborative work with minimalist composer La Monte Young.  - A composer (Latin "compn"; literally "one who puts together") is a person who creates or writes music, which can be vocal music (for a singer or choir), instrumental music (e.g., for solo piano, string quartet, wind quintet or orchestra) or music which combines both instruments and voices (e.g., opera or art song, which is a singer accompanied by a pianist). The core meaning of the term refers to individuals who have contributed to the tradition of Western classical music through creation of works expressed in written musical notation (e.g., sheet music scores).  - Terrence Mitchell "Terry" Riley (born June 24, 1935) is an American composer and performing musician associated with the minimalist school of Western classical music, of which he was a pioneer. His work is deeply influenced by both jazz and Indian classical music.  - Indian classical music is a genre of South Asian music. It has two major traditions. The North Indian classical music tradition is called "Hindustani", while the South Indian expression is called "Carnatic". These traditions were not distinct till about the 16th century. There on, during the turmoils of Islamic rule period of the Indian subcontinent, the traditions separated and evolved into distinct forms. However, the two systems continue to have more common features than differences.  - Angus William MacLise (March 4, 1938  June 21, 1979) was an American percussionist, composer, poet, occultist and calligrapher, known as the first drummer for the Velvet Underground.  - In mathematics, a ratio is a relationship between two numbers indicating how many times the first number contains the second. For example, if a bowl of fruit contains eight oranges and six lemons, then the ratio of oranges to lemons is eight to six (that is, 8:6, which is equivalent to the ratio 4:3). Thus, a ratio can be a fraction as opposed to a whole number. Also, in this example the ratio of lemons to oranges is 6:8 (or 3:4), and the ratio of oranges to the total amount of fruit is 8:14 (or 4:7).    Given the information above, choose from the list below the object entity that exhibits the relation 'genre' with the subject 'day of niagara'.  Choices: - album  - art  - blues  - concept album  - culture  - dance  - drone music  - education  - entertainment  - experimental art  - experimental film  - experimental music  - experimental rock  - fashion  - fluxus  - genre  - jazz  - literature  - march  - mathematics  - music  - musical  - opera  - orchestra  - poet  - pop  - ragtime  - rock  - serialism  - society  - swing  - television  - theater  - urban  - variety  - video  - visual arts  - vocal music  - war  - western
Answer:
drone music