sentence: Racehorses are most often thoroughbreds.
sentences_before: Horse racing' is a sport in which a race is held between racehorses, horses bred for racing.
sentences_after: The Kentucky Derby is a major horserace that is held at Churchill Downs in Louisville, Kentucky every year. The Kentucky Derby is part of the Triple Crown, which includes two other races. Yonkers, New York is a major venue for harness racing.
concept_name: racehorse
headings: Horse racing