Question: who holds the record for the fastest kentucky derby
[{'answer': 'Secretariat', 'provenance': [{'wikipedia_id': '17135', 'title': 'Kentucky Derby', 'start_paragraph_id': 12, 'start_character': 79, 'end_paragraph_id': 12, 'end_character': 90, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}]