Question: where is the show doc martin filmed at
[{'answer': 'Port Isaac', 'provenance': [{'wikipedia_id': '1047976', 'title': 'Port Isaac', 'start_paragraph_id': 0, 'start_character': 0, 'end_paragraph_id': 0, 'end_character': 10, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]