Complex sentence: Silent film actor William S. Hart was the ranch's was first owner and was used to film many westerns, including "Duel in the Sun" and episodes of "Bonanza" and "The Lone Ranger".
Split into simpler sentences: Silent film actor William S. Hart was the ranch's was first owner. The ranch served as the set for many westerns, including "Duel in the Sun" and episodes of "Bonanza" and "The Lone Ranger".