Complex sentence: The screenplay by Mark L. Smith and Iñárritu is based on Michael Punke's 2002 novel of the same name, which was inspired by the life of frontiersman Hugh Glass.
Split into simpler sentences: The screenplay by Mark L. Smith and Iñárritu is based on Michael Punke's 2002 novel of the same name. It is inspired by the life of frontiersman Hugh Glass.