Question: who had the best batting average in baseball history
[{'answer': 'Ty Cobb', 'provenance': [{'wikipedia_id': '18933273', 'title': 'Batting average', 'start_paragraph_id': 7, 'start_character': 337, 'end_paragraph_id': 7, 'end_character': 344, 'bleu_score': 1.0, 'section': 'Section::::Baseball.\n'}]}]