Question: how many episodes are there in doc martin series 7
[{'answer': '8', 'provenance': [{'wikipedia_id': '21025437', 'title': 'List of Doc Martin episodes', 'start_paragraph_id': 2, 'start_character': 276, 'end_paragraph_id': 2, 'end_character': 277, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]