Complex sentence: Edward Kleban (circa 1939-1987) was an American musical theatre composer and lyricist, best known for writing the lyrics to A Chorus Line, which featured music by Marvin Hamlisch.
Split into simpler sentences: Edward Kleban (c.1939-1987) was an American musical theatre composer and lyricist. He is best known for writing the lyrics to "A Chorus Line", which featured music by Marvin Hamlisch.