Question: who won men's us open tennis 2012
[{'answer': 'Andy Murray', 'provenance': [{'wikipedia_id': '37694641', 'title': "2012 US Open – Men's singles final", 'start_paragraph_id': 1, 'start_character': 138, 'end_paragraph_id': 1, 'end_character': 149, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '37694641', 'title': "2012 US Open – Men's singles final", 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 880, 'bleu_score': 0.8996786998871711, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6196065908669748184}, 'section': 'Section::::Abstract.'}]}]