Complex sentence: The music is by Mary Rodgers, the book by Larry Siegel and Stan Hart, with various lyricists--among them Marshall Barer, Steven Vinaver, and Stephen Sondheim.
Split into simpler sentences: The music is by Mary Rodgers, the book by Larry Siegel and Stan Hart. The show's various lyricists include Siegel, Marshall Barer, Steven Vinaver, and Stephen Sondheim.