Question: who portrayed watson in the recent bbc show 'sherlock
[{'answer': 'Martin Freeman', 'provenance': [{'wikipedia_id': '20816992', 'title': 'Sherlock (TV series)', 'start_paragraph_id': 1, 'start_character': 216, 'end_paragraph_id': 1, 'end_character': 230, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '20816992', 'title': 'Sherlock (TV series)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 1002, 'bleu_score': 0.9633322927146201, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15371875726951069421}, 'section': 'Section::::Abstract.'}]}]