Complex sentence: Parker worked with Rice and Lloyd Webber to compose the soundtrack, reworking the original songs by creating the music first and then the lyrics; they also wrote a new song, "You Must Love Me", for the film.
Split into simpler sentences: Parker worked with Rice and Lloyd Webber to compose the soundtrack, reworking the original songs by creating the music first and then the lyrics. They also wrote a new song, "You Must Love Me", for the film.