Question: who has the highest single season batting average in mlb history
[{'answer': 'Hugh Duffy', 'provenance': [{'wikipedia_id': '19418411', 'title': 'List of Major League Baseball players with a .400 batting average in a season', 'start_paragraph_id': 1, 'start_character': 726, 'end_paragraph_id': 1, 'end_character': 736, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '19418411', 'title': 'List of Major League Baseball players with a .400 batting average in a season', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 881, 'bleu_score': 0.9720609073682611, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1097430633710087818}, 'section': 'Section::::Abstract.'}]}]