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John  Cage

John Cage (1912-1992)

Born: September 5, 1912, Los Angeles
Died: August 12, 1992, New York (age 79)
American
wikipedia

Thirty [30] Pieces (String Quartet)

(for 2 violins, viola and cello)
Composed: 1983 (age 70-71)
Duration: 30 minutes (approximately)