"Carla Bley (born Lovella May Borg, May 11, 1936) is an American jazz composer, pianist, organist and bandleader. An important figure in the free jazz movement ...
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of the 1960s, she is perhaps best known for her jazz opera Escalator over the Hill (released as a triple LP set), as well as a book of compositions that have been performed by many other artists, including Gary Burton, Jimmy Giuffre, George Russell, Art Farmer, John Scofield and her ex-husband Paul Bley." - (en.wikipedia.org 01.01.2021)