Question: Song Books (Solos for Voice 3–92) is a collection of short works by John Milton Cage Jr., was an American composer, music theorist, writer, philosopher, and artist, also instrumental in the development of modern dance, mostly through his association with whitch choreographer ?
Sentence (from "John Cage"): 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.
Relevant evidence: Yes