Complex sentence: The avante garde "Alien 3" score was written for the motion picture of the same name, scored by Elliot Goldenthal, it was his first big mainstream score; he described it as an experiment and spent a whole year creating it.
Split into simpler sentences: The avante garde "Alien³" score was written for the motion picture of the same name. Scored by Elliot Goldenthal, it was his first big mainstream score; he described it as an experiment and spent a whole year creating it.