Question: who plays john in last tango in halifax
[{'answer': 'Tony Gardner', 'provenance': [{'wikipedia_id': '37968330', 'title': 'Last Tango in Halifax', 'start_paragraph_id': 1, 'start_character': 695, 'end_paragraph_id': 1, 'end_character': 707, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '37968330', 'title': 'Last Tango in Halifax', 'start_paragraph_id': 27, 'start_character': 0, 'end_paragraph_id': 27, 'end_character': 683, 'bleu_score': 0.561078270123469, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12739529424599244337}, 'section': 'Section::::Production.:Characters and casting.\n'}]}]