Problem: Background: Brian Douglas Wilson (born June 20, 1942) is an American musician, singer, songwriter, and record producer who co-founded the Beach Boys. After signing with Capitol Records in 1962, Wilson wrote or co-wrote more than two dozen Top 40 hits for the group. In addition to his lifelong struggles with mental illness, Wilson is known for his unorthodox approaches to pop composition and mastery of recording techniques, and he is widely acknowledged as one of the most innovative and significant songwriters of the late 20th century. The Beach Boys were formed by Brian, his brothers Carl and Dennis, their cousin Mike Love, and friend Al Jardine.
Context: Wilson spent a great deal of the two years following his father's June 1973 death secluded in the chauffeur's quarters of his home; sleeping, abusing alcohol, taking drugs (including heroin), overeating, and exhibiting self-destructive behavior. He attempted to drive his vehicle off a cliff, and at another time, demanded that he be pushed into and buried in a grave he had dug in his backyard. During this period, his voice deteriorated significantly as a result of his mass consumption of cocaine and incessant chain smoking. Wilson later said that he was preoccupied with "[doing] drugs and hanging out with Danny Hutton" (whose house became the center of Wilson's social life) during the mid-1970s. John Sebastian often showed up at Wilson's Bel Air home "to jam" and later recalled that "it wasn't all grimness." Although increasingly reclusive during the day, Wilson spent many nights at Hutton's house fraternizing with Hollywood Vampire colleagues such as Alice Cooper and Iggy Pop, who were mutually bemused by an extended Wilson-led singalong of the folk song "Shortnin' Bread"; other visitors of Hutton's home included Vampires Harry Nilsson, John Lennon, Ringo Starr, and Keith Moon. Micky Dolenz recalls taking LSD with Wilson, Lennon, and Nilsson, where Wilson "played just one note on a piano over and over again". On several occasions, Marilyn Wilson sent her friends to climb Hutton's fence and retrieve her husband. Jimmy Webb reported Wilson's presence at an August 2, 1974 session for Nilsson's "Salmon Falls"; he kept in the back of the studio playing "Da Doo Ron Ron" haphazardly on a B3 organ. Later that month, he was photographed at Moon's 28th birthday party (held on August 28 at the Beverly Wilshire Hotel) wearing only his bathrobe. Sometime in 1974, Wilson interrupted a set by jazz musician Larry Coryell at The Troubadour by leaping onto stage and singing "Be-Bop-A-Lula", again wearing slippers and a bathrobe. During summer 1974, the Capitol Records-era greatest hits compilation Endless Summer reached number 1 on the Billboard charts, reaffirming the relevance of the Beach Boys in the popular imagination. However, recording sessions for a new album under the supervision of Wilson and James William Guercio at Caribou Ranch and the band's studio in Santa Monica that autumn yielded only a smattering of basic tracks, including a banjo-driven arrangement of "The Battle Hymn of the Republic"; "It's O.K.", an uptempo collaboration with Mike Love; the ballad "Good Timin'"; and Dennis Wilson's "River Song". Eventually, Wilson diverted his attentions to "Child of Winter", a Christmas single co-written with Stephen Kalinich; released belatedly for the holiday market on December 23, it failed to chart. Though still under contract to Warner Brothers, Wilson signed a sideline production deal with Bruce Johnston and Terry Melcher's Equinox Records in early 1975. Together, they founded the loose-knit supergroup known as California Music, which involved them along with L.A. musicians Gary Usher, Curt Boettcher, and a few others. This contract was nullified by the Beach Boys' management, who perceived it as an attempt by Wilson to relieve the burden of his growing drug expenses, and it was demanded that Wilson focus his efforts on the Beach Boys, even though he strongly desired to escape from the group. The idea of California Music immediately disintegrated.
Question: How long did it stay #1 on the charts?
Answer:

Problem: Background: John Milton Cage Jr. (September 5, 1912 - August 12, 1992) was an American composer and music theorist. A pioneer of indeterminacy in music, electroacoustic music, and non-standard use of musical instruments, Cage was one of the leading figures of the post-war avant-garde. Critics have lauded him as one of the most influential composers of the 20th century. He was also instrumental in the development of modern dance, mostly through his association with choreographer Merce Cunningham, who was also Cage's romantic partner for most of their lives.
Context: In 1987, Cage completed a piece called Two, for flute and piano, dedicated to performers Roberto Fabbriciani and Carlo Neri. The title referred to the number of performers needed; the music consisted of short notated fragments to be played at any tempo within the indicated time constraints. Cage went on to write some forty such pieces, one of the last being Eighty (1992, premiered in Munich on 28 October 2011), usually employing a variant of the same technique; together, these works are known as Number Pieces. The process of composition, in many of the later Number Pieces, was simple selection of pitch range and pitches from that range, using chance procedures; the music has been linked to Cage's anarchic leanings. One11 (i.e. the eleventh piece for a single performer), completed in early 1992, was Cage's first and only foray into film. Another new direction, also taken in 1987, was opera: Cage produced five operas, all sharing the same title Europera, in 1987-91. Europeras I and II require greater forces than III, IV and V, which are on a chamber scale. Already in the course of the 1980s, Cage's health worsened progressively: he suffered not only from arthritis, but also from sciatica and arteriosclerosis. He suffered a stroke that left the movement of his left leg restricted, and, in 1985, broke an arm. During this time, Cage pursued a macrobiotic diet. Nevertheless, ever since arthritis started plaguing him, the composer was aware of his age, and, as biographer David Revill observed, "the fire which he began to incorporate in his visual work in 1985 is not only the fire he has set aside for so long--the fire of passion--but also fire as transitoriness and fragility." On August 11, 1992, while preparing evening tea for himself and Cunningham, Cage suffered another stroke. He was taken to St. Vincent's Hospital in Manhattan, where he died on the morning of August 12. He was 79. According to his wishes, Cage's body was cremated, and the ashes scattered in the Ramapo Mountains, near Stony Point, New York, the same place where Cage scattered the ashes of his parents, years before. The composer's death occurred only weeks before a celebration of his 80th birthday organized in Frankfurt by the composer Walter Zimmermann and the musicologist Stefan Schaedler was due to take place. The event went ahead as planned, including a performance of the Concert for Piano and Orchestra by David Tudor and Ensemble Modern. Merce Cunningham lived another 17 years, dying of natural causes in July 2009.
Question: what kind of musical style was Eighty?
Answer:
Two, for flute and piano,