Question: when did a plane land on the hudson river
[{'answer': 'January 15 , 2009', 'provenance': [{'wikipedia_id': '21110342', 'title': 'US Airways Flight 1549', 'start_paragraph_id': 5, 'start_character': 3, 'end_paragraph_id': 5, 'end_character': 20, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'provenance': [{'wikipedia_id': '21110342', 'title': 'US Airways Flight 1549', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 494, 'bleu_score': 0.946458428441119, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 2474984129963699994}, 'section': 'Section::::Abstract.'}]}]