Complex sentence: Zachary "Zack" Mayo (Richard Gere) has been living in the Philippines with his father Byron (Robert Loggia), an alcoholic U.S. Navy chief boatswain's mate, since early adolescence, after Zack's mother committed suicide.
Split into simpler sentences: Zachary "Zack" Mayo (Richard Gere) has been living in the Philippines with his father Byron (Robert Loggia), an alcoholic U.S. Navy chief boatswain's mate. Byron has raised him since early adolescence, after Zack's mother committed suicide.