Question: Who won last triple crown of horse racing?
Answer: Justify
Disambiguated annotations:
qaPairs: question: Which horse won the last triple crown of horse racing?
answer: Justify
question: Which jockey won the last triple crown of horse racing?
answer: Mike Smith
question: Which trainer won the last triple crown of horse racing?
answer: Bob Baffert
question: Which breeder won the last triple crown of  horse racing?
answer: John D Gunther