Complex sentence: The race was named in honor of the famous Italian breeder Federico Tesio, owner of Dormello Stud in Dormelletto, Novara and who was one of the most important breeders of Thoroughbreds in the history of horse racing.
Split into simpler sentences: The race was named in honor of famous Italian breeder Federico Tesio, owner of Dormello Stud in Dormelletto, Novara. Tesio was one of the most important breeders of Thoroughbreds in the history of horse racing.