Question: who has fastest 40 time at nfl combine
[{'answer': '4.22', 'provenance': [{'wikipedia_id': '2685711', 'title': '40-yard dash', 'start_paragraph_id': 11, 'start_character': 41, 'end_paragraph_id': 11, 'end_character': 45, 'bleu_score': 1.0, 'section': 'Section::::Records.\n'}]}]