Complex sentence: He graduated from John F. Kennedy High School in Warren, Ohio and from New York University's film school at the Tisch School of the Arts, where he was a schoolmate of writer/director Charlie Kaufman.
Split into simpler sentences: He graduated from John F. Kennedy High School in Warren, Ohio and from New York University's film school at the Tisch School of the Arts. There he was a schoolmate of writer/director Charlie Kaufman.