Question: who won the nobel peace prize in 2009
[{'answer': 'Barack Obama', 'provenance': [{'wikipedia_id': '24629811', 'title': '2009 Nobel Peace Prize', 'start_paragraph_id': 1, 'start_character': 66, 'end_paragraph_id': 1, 'end_character': 78, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '24629811', 'title': '2009 Nobel Peace Prize', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 416, 'bleu_score': 0.9262685672663881, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12440747915384767198}, 'section': 'Section::::Abstract.'}]}]