Question: who was the man who tightroped across the twin towers
[{'answer': 'Philippe Petit', 'provenance': [{'wikipedia_id': '1718352', 'title': 'Philippe Petit', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '1718352', 'title': 'Philippe Petit', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 653, 'bleu_score': 0.738193232551674, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15072049712967131890}, 'section': 'Section::::Abstract.'}]}]