Question: who is the best rushing quarterback of all time
[{'answer': 'Michael Vick', 'provenance': [{'wikipedia_id': '42383059', 'title': 'Dual-threat quarterback', 'start_paragraph_id': 3, 'start_character': 263, 'end_paragraph_id': 3, 'end_character': 275, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]