Question: who is the movie the greatest showman based on
[{'answer': 'P.T. Barnum', 'provenance': [{'wikipedia_id': '44435434', 'title': 'The Greatest Showman', 'start_paragraph_id': 57, 'start_character': 241, 'end_paragraph_id': 57, 'end_character': 252, 'bleu_score': 1.0, 'section': 'Section::::Reception.:Critical response.\n'}]}, {'provenance': [{'wikipedia_id': '44435434', 'title': 'The Greatest Showman', 'start_paragraph_id': 1, 'start_character': 67, 'end_paragraph_id': 1, 'end_character': 440, 'bleu_score': 0.7581247062834431, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6797880524610787528}, 'section': 'Section::::Abstract.'}]}]