Question: who is the guy who walked 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': 319602785853496189}, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6230184', 'title': 'The Man Who Walked Between the Towers', 'section': 'Section::::Abstract.', 'start_paragraph_id': 1, 'end_paragraph_id': 1, 'meta': {'evidence_span': ["The Man Who Walked Between the Towers is a children's picture book written and illustrated by American Mordicai Gerstein. Published in 2003, the book recounts the heart-stopping achievement of Philippe Petit, a French man who, on an August morning in 1974, walked, lay, knelt and danced on a tightrope wire between the roofs of the twin towers of the World Trade Center, a quarter mile above the ground. Gerstein won the 2004 Caldecott Medal for his illustrations. The book has been adapted to film and ballet.", "The Man Who Walked Between the Towers is a children's picture book written and illustrated by American Mordicai Gerstein. Published in 2003, the book recounts the heart-stopping achievement of Philippe Petit", "The Man Who Walked Between the Towers is a children's picture book written and illustrated by American Mordicai Gerstein. Published in 2003, the book recounts the heart-stopping achievement of Philippe Petit, a French man who, on an August morning in 1974, walked, lay, knelt and danced on a tightrope wire between the roofs of the twin towers of the World Trade Center, a quarter mile above the ground. Gerstein won the 2004 Caldecott Medal for his illustrations. The book has been adapted to film and ballet."]}}]}]