Complex sentence: Bold Lad (1962--1986) was an American Champion Thoroughbred racehorse bred and raced by Gladys Phipps and her brother Ogden L. Mills under their Wheatley Stable banner.
Split into simpler sentences: Bold Lad (1962--1986) was an American Champion Thoroughbred racehorse. He was bred and raced by Gladys Phipps and her brother Ogden L. Mills under their Wheatley Stable banner.