Complex sentence: The Lane's End Breeders' Futurity is a Grade I race for two-year-old thoroughbred horses run at a distance of one and one-sixteenth miles on the Keeneland dirt.
Split into simpler sentences: The Lane's End Breeders' Futurity is a Grade I race for two-year-old thoroughbred horses. It is raced at a distance of one and one-sixteenth miles on the Keeneland dirt.