Question: who plays p.t. barnum in the greatest showman
[{'answer': 'Hugh Jackman', 'provenance': [{'wikipedia_id': '44435434', 'title': 'The Greatest Showman', 'start_paragraph_id': 1, 'start_character': 177, 'end_paragraph_id': 1, 'end_character': 189, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]