Question: in the tv series dad's army what was captain mainwaring's first name
[{'answer': 'George', 'provenance': [{'wikipedia_id': '3584913', 'title': 'Captain Mainwaring', 'start_paragraph_id': 1, 'start_character': 8, 'end_paragraph_id': 1, 'end_character': 14, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]