Question: who plays john watson in bbc's sherlock
[{'answer': 'Martin John Christopher Freeman', 'provenance': [{'wikipedia_id': '483492', 'title': 'Martin Freeman', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 31, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '483492', 'title': 'Martin Freeman', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 407, 'bleu_score': 0.7895440112129951, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14069481106502962285}, 'section': 'Section::::Abstract.'}]}]