Question: who won the oscar for best actress in 2012
[{'answer': 'Meryl Streep', 'provenance': [{'wikipedia_id': '23576558', 'title': '84th Academy Awards', 'start_paragraph_id': 6, 'start_character': 552, 'end_paragraph_id': 6, 'end_character': 564, 'bleu_score': 1.0, 'section': 'Section::::Winners and nominees.\n'}]}, {'provenance': [{'wikipedia_id': '23576558', 'title': '84th Academy Awards', 'start_paragraph_id': 6, 'start_character': 0, 'end_paragraph_id': 6, 'end_character': 784, 'bleu_score': 0.768331369245813, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4239082810108986308}, 'section': 'Section::::Winners and nominees.\n'}]}]