Question: In which country did Edgard Varèse, the French-born composer of Octandre, spend most of his career?

Context paragraphs:
Alan Clayson: Alan Clayson (born 3 May 1951, Dover, Kent) is an English singer-songwriter, author and music journalist.  He gained popularity in the late 1970s as leader of the band Clayson and the Argonauts.  In addition to contributing to publications such as "Record Collector", "Mojo" and "Folk Roots", he subsequently established himself as a prolific writer of music biographies.  Among his many books are "Backbeat", which details the Beatles' early career in Germany, "Ringo Starr: Straight Man or Joker?" , and biographies of Jacques Brel, the Yardbirds, Serge Gainsbourg and Edgard Varèse.

Amériques: Amériques is a musical composition by the French-born composer Edgard Varèse.

Reiner Bredemeyer: Reiner Bredemeyer (2 February 1929 − 5 December 1995) was a German composer.  He was born in Vélez, Santander and went to school in Breslau.  In 1944 he was drafted into military service and was briefly held as a prisoner of war of the American Army in Bavaria.  After the end of World War II, he met composer Karl Amadeus Hartmann who introduced him to the music of Igor Stravinsky, Béla Bartók, Anton Webern, Edgard Varèse, Charles Ives and Erik Satie.  From 1949 to 1953 he studied composition with Karl Höller at the Munich Academy for Musical Arts.  In 1954 Paul Dessau took him to East Germany, where Bredemeyer became a master student of Rudolf Wagner-Régeny at the DDR Academy of Arts, Berlin.

Déserts: Déserts (1950–1954) is a piece by Edgard Varèse for 14 winds (brass and woodwinds), 5 percussion players, 1 piano, and electronic tape.  Percussion instruments are exploited for their resonant potential, rather than used solely as accompaniment.  According to Varèse the title of the piece regards, "not only physical deserts of sand, sea, mountains, and snow, outer space, deserted city streets... but also distant inner space... where man is alone in a world of mystery and essential solitude."

Nocturnal (Varèse): Nocturnal (1961) for soprano, male choir, and orchestra, is a musical composition by Edgard Varèse with text consisting of syllables by Varèse and words and phrases adapted from "House of Incest" by Anaïs Nin (1936), revised and completed posthumously by Chou Wen-chung (1968), The piece is commissioned by and dedicated to the Koussevitzky Music Foundation, published 1972.  It includes music for flexatone and two ondes Martenots.  The use of Dada-like "meta-language" in "Ecuatorial" and in "Nocturnal" was suggested by Antonin Artaud.  The premier was conducted by Robert Craft at The Town Hall in New York on May 1, 1961.

Edgard Varèse: Edgard Victor Achille Charles Varèse (] ; also spelled Edgar Varèse; December 22, 1883 – November 6, 1965) was a French-born composer who spent the greater part of his career in the United States.

Poème électronique: Poème électronique (English Translation: "Electronic Poem") is an 8-minute piece of electronic music by composer Edgard Varèse, written for the Philips Pavilion at the 1958 Brussels World’s Fair.  The Philips corporation commissioned Le Corbusier to design the pavilion, which was intended as a showcase of their engineering progress.  Le Corbusier came up with the title "Poème électronique", saying he wanted to create a "poem in a bottle".  Varèse composed the piece with the intention of creating a liberation between sounds and as a result uses noises not usually considered "musical" throughout the piece.

Revolution 9: "Revolution 9" is a recorded composition that appeared on the Beatles' 1968 eponymous LP release (popularly known as the "White Album").  The sound collage, credited to Lennon–McCartney, was created primarily by John Lennon with assistance from George Harrison and Yoko Ono.  Lennon said he was trying to paint a picture of a revolution using sound.  The composition was influenced by the avant-garde style of Ono as well as the "musique concrète" works of composers such as Edgard Varèse and Karlheinz Stockhausen.

Octandre: Octandre is a work for small orchestra by Edgard Varèse, written in 1923 and published by J. Curwen & Sons in London in 1924 (new edition, New York: G. Ricordi & Co., 1956; new edition, revised and edited by Chou Wen-chung, New York: Ricordi, 1980).

Varèse Sarabande: Varèse Sarabande is an American record label, distributed by Universal Music Group, which specializes in film scores and original cast recordings.  It aims to reissue rare or unavailable albums, as well as newer releases by artists no longer under a contract.  The label's name was derived from combining French-born composer Edgard Varèse's last name with the musical term sarabande, a slow Spanish dance.

Supporting paragraphs: Octandre Edgard Varèse
Answer: the United States