Question: how many episodes in gavin and stacey series 3
[{'answer': '20 episodes', 'provenance': [{'wikipedia_id': '17145244', 'title': 'List of Gavin & Stacey episodes', 'start_paragraph_id': 2, 'start_character': 83, 'end_paragraph_id': 2, 'end_character': 94, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '17145244', 'title': 'List of Gavin & Stacey episodes', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 514, 'bleu_score': 0.9125923116716941, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 381076867901660508}, 'section': 'Section::::Abstract.'}]}]