Question: who played tom in when the boat comes in
[{'answer': 'John Nightingale', 'provenance': [{'wikipedia_id': '2585088', 'title': 'When the Boat Comes In', 'start_paragraph_id': 14, 'start_character': 12, 'end_paragraph_id': 14, 'end_character': 28, 'bleu_score': 1.0, 'section': 'Section::::Regular cast.\n'}]}]