Question: call the midwife season 1 how many episodes
[{'answer': '6', 'provenance': [{'wikipedia_id': '42615204', 'title': 'List of Call the Midwife episodes', 'start_paragraph_id': 1, 'start_character': 226, 'end_paragraph_id': 1, 'end_character': 227, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]