Question: who is the captain twice upon a time
[{'answer': 'Mark Gatiss', 'provenance': [{'wikipedia_id': '54445202', 'title': 'Twice Upon a Time (Doctor Who)', 'start_paragraph_id': 24, 'start_character': 349, 'end_paragraph_id': 24, 'end_character': 360, 'bleu_score': 1.0, 'section': 'Section::::Production.:Cast notes.\n'}]}]