Question: when does the next doc martin series start
[{'answer': '20 September 2017', 'provenance': [{'wikipedia_id': '21025437', 'title': 'List of Doc Martin episodes', 'start_paragraph_id': 2, 'start_character': 287, 'end_paragraph_id': 2, 'end_character': 304, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '21025437', 'title': 'List of Doc Martin episodes', 'start_paragraph_id': 2, 'start_character': 0, 'end_paragraph_id': 2, 'end_character': 464, 'bleu_score': 0.564533245973589, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11045028842079378948}, 'section': 'Section::::Abstract.'}]}]