Complex sentence: Cobb stopped a short distance away from the ranch and saw the Mexicans robbing the store so he got back into his car and drove twelve miles to the nearest telephone and called Lucas Brite who was at his home in Marfa.
Split into simpler sentences: Cobb stopped a short distance away from the ranch and saw the Mexicans robbing the store. He then got back into his car and drove twelve miles to the nearest telephone and called Lucas Brite, who was at his home in Marfa.