Question: who sings theme song to not going out
[{'answer': 'Frank Sinatra impersonator Stephen Triffitt', 'provenance': [{'wikipedia_id': '7329974', 'title': 'Not Going Out', 'start_paragraph_id': 22, 'start_character': 31, 'end_paragraph_id': 22, 'end_character': 74, 'bleu_score': 1.0, 'section': 'Section::::Production.\n'}]}, {'provenance': [{'wikipedia_id': '7329974', 'title': 'Not Going Out', 'start_paragraph_id': 22, 'start_character': 0, 'end_paragraph_id': 22, 'end_character': 74, 'bleu_score': 0.8242367502646051, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16458830671500800571}, 'section': 'Section::::Production.\n'}]}]