Complex sentence: The son of a Hollywood press agent and his wife, who worked as an assistant to Jimmy Durante, Mullen was born in Los Angeles, California, and attended St. Charles Borromeo Church (North Hollywood) grade school.
Split into simpler sentences: The son of a Hollywood press agent and his wife, who worked as an assistant to Jimmy Durante, Mullen was born in Los Angeles, California. He attended St. Charles Borromeo Church (North Hollywood) grade school.