Complex sentence: The film was based upon a 1960 autobiographical book of the same name by Gavin Maxwell, and featured the stars of "Born Free", another movie about a close relationship between humans and a wild animal.
Split into simpler sentences: The film was based upon a 1960 autobiographical book of the same name by Gavin Maxwell. It featured the stars of "Born Free", another movie about a close relationship between humans and a wild animal.