Complex sentence: From 1955 to 1958 he collaborated with Kenward Elmslie on The Sweet Bye and Bye, first performed at the Juilliard School and from 1958 to 1959 he wrote three orchestral works and numerous smaller pieces.
Split into simpler sentences: From 1955 to 1958 he collaborated with Kenward Elmslie on "The Sweet Bye and Bye", first performed at the Juilliard School. From 1958 to 1959 he wrote three orchestral works and numerous smaller pieces.