Question: who killed batman's parents in batman begins
[{'answer': 'Joe Chill', 'provenance': [{'wikipedia_id': '481605', 'title': 'Batman Begins', 'start_paragraph_id': 5, 'start_character': 276, 'end_paragraph_id': 5, 'end_character': 285, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '481605', 'title': 'Batman Begins', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 399, 'bleu_score': 0.7416576912839311, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2614899357297307803}, 'section': 'Section::::Plot.\n'}]}]