Question: What is the relation of Credo in Us and John Cage?
Context: Liz Phillips (born 1951) is an American artist specializing in sound art and interactive art.  A pioneer in the development of interactive sound sculpture, Phillips' installations explore the possibilities of electronic sound in relation to living forms.  Her work has been exhibited at a wide range of major museums, alternative spaces, festivals and other venues, including the Whitney Museum of American Art, the San Francisco Museum of Modern Art, the Spoleto Festival USA, the Walker Art Center, Ars Electronica, Jacob's Pillow, The Kitchen, and Creative Time.  Phillips' collaborations include pieces with Nam June Paik and the Merce Cunningham Dance Company, and her work has been presented by the Cleveland Orchestra, IBM, and the World Financial Center.  She is often associated with, and exhibited alongside other early American sound artists Pauline Oliveros, John Cage and Max Neuhaus. Sonatas and Interludes is a collection of twenty pieces for prepared piano by American avant-garde composer John Cage (1912–1992).  It was composed in 1946–48, shortly after Cage's introduction to Indian philosophy and the teachings of art historian Ananda K. Coomaraswamy, both of which became major influences on the composer's later work.  Significantly more complex than his other works for prepared piano, "Sonatas and Interludes" is generally recognized as one of Cage's finest achievements. Zaj was an experimental music and performance art group formed in 1959 in Milan, Italy by composers and intermedia artists Walter Marchetti and Juan Hidalgo with the support of the American composer John Cage.  The group received major contributions by different artists from the Spanish avant-garde scene, notably from the writer and diplomat José Luis Castillejo and from the interdisciplinary artist Esther Ferrer.  During the 1960s, members of Zaj took part in different Fluxus events organised by George Maciunas.  With the help of John Cage and his agent Mimi Johnson, Zaj also toured in different cities in the United States in the late 1970s.  The group was disbanded in 1993 by Walter Marchetti. Six Melodies is a collection of six pieces for violin and keyboard instrument by John Cage.  It was composed in 1950, shortly after Cage completed his "String Quartet in Four Parts".  The work uses the same techniques: the gamut technique and the nested rhythmic proportions.  First, a fixed number of sonorities (single tones, intervals and aggregates) is prepared, each created independently of the other.  These sonorities are called gamuts.  Sequences of gamuts are then used to create melodies with harmonic backgrounds that are in no way connected to functional harmony, which Cage sought to avoid.  The collection of gamuts used in "Six Melodies" is nearly identical to the one used in the "String Quartet" (Cage called "Six Melodies" "a postscript" to that work).  The structure of each piece, and that of each phrase, is defined by the same rhythmic pattern: 3 1/2, 3 1/2, 4, 4, 3, 4.  The violinist is instructed in the score to play without vibrato and with minimum weight on the bow. American avant-garde composer John Cage (1912–1992) started composing pieces for solo prepared piano around 1938–40.  The majority of early works for this instrument were created to accompany dances by Cage's various collaborators, most frequently Merce Cunningham.  In response to frequent criticisms of prepared piano, Cage cited numerous predecessors (such as Henry Cowell).  In the liner notes for the very first recording of his most highly acclaimed work for prepared piano, "Sonatas and Interludes", Cage wrote: "Composing for the prepared piano is not a criticism of the instrument.  I'm only being practical."  This article presents a complete list of Cage's works for prepared piano, with comments on each composition. John Cage Day was the name given to several events held during 2012, to commemorate the 100th anniversary of the birth of the composer John Cage. John Milton Cage Jr. (September 5, 1912 – August 12, 1992) was an American composer, music theorist, writer, philosopher, and artist.  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. Credo in Us is a musical composition by the American experimental music composer, writer and visual artist John Cage.  It was written in July 1942 and revised in October of that year.  In the wake of Pearl Harbor, this piece avoided the populist tendencies of fellow American composers at the time, while the piece's title is thought to be a call to collective unity. Shigeko Kubota (久保田 成子 , Kubota Shigeko ) (2 August 1937 – 23 July 2015) was a Japanese video artist, sculptor and avant-garde performance artist, who mostly lived in New York City.  She was one of the first artists to adopt the portable video camera Sony Portapak in 1967.  Kubota is known for constructing sculptural installations with a strong DIY aesthetic, which include sculptures with embedded monitors playing her original videos.  She was a key member and influence on Fluxus, the international group of avant-garde artists centered on George Maciunas, having been involved with the group since witnessing John Cage perform in Tokyo in 1962 and subsequently moving to New York in 1964.  She was closely associated with George Brecht, Jackson Mac Low, John Cage, Joe Jones, Nam June Paik, and Ay-O, other members of Fluxus.  Kubota was deemed "Vice Chairman" of the Fluxus Organization by Maciunas. Richard Bunger Evans, also known as Richard Bunger, (born 1942) is an American composer and pianist who worked with John Cage and subsequently wrote "the classic book on John Cage," "The Well-Prepared Piano".  Evans has composed and performed music for opera and musical theatre, piano, art songs, prepared piano, choral music, string orchestra and chamber music.  Evans continues to compose and perform in these various genres, and is highly respected as an accompanist to singers.  During his 17-year career as a music professor, Evans was named one of two Outstanding Professors of 1981–1982 in the California State University system.
Answer: music