Question: who has won the indy 500 3 times
[{'answer': 'Dario Franchitti'}, {'answer': 'Hélio Castroneves'}, {'answer': 'Bobby Unser'}, {'answer': 'Johnny Rutherford'}, {'answer': 'Mauri Rose', 'provenance': [{'wikipedia_id': '1251765', 'title': 'List of Indianapolis 500 winners', 'start_paragraph_id': 6, 'start_character': 24, 'end_paragraph_id': 6, 'end_character': 34, 'bleu_score': 1.0, 'section': 'Section::::Driver statistics.:Winning drivers who did not start next race.\n'}]}, {'answer': 'Wilbur Shaw'}, {'answer': 'Louis Meyer', 'provenance': [{'wikipedia_id': '1251765', 'title': 'List of Indianapolis 500 winners', 'start_paragraph_id': 3, 'start_character': 213, 'end_paragraph_id': 3, 'end_character': 224, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Rick Mears', 'provenance': [{'wikipedia_id': '1251765', 'title': 'List of Indianapolis 500 winners', 'start_paragraph_id': 2, 'start_character': 427, 'end_paragraph_id': 2, 'end_character': 437, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'Al Unser , Sr .'}, {'answer': 'A.J. Foyt'}]