Complex sentence: Bardstown (1952-1972) was an American Thoroughbred racehorse bred and raced by Calumet Farm of Lexington, Kentucky who named him for the city of Bardstown in Nelson County, Kentucky.
Split into simpler sentences: Bardstown (1952-1972) was an American Thoroughbred racehorse. He was bred and raced by Calumet Farm of Lexington, Kentucky who named him for the city of Bardstown in Nelson County, Kentucky.