Question: why did charity hospital in new orleans close
[{'answer': 'Hurricane Katrina', 'provenance': [{'wikipedia_id': '7690016', 'title': 'Charity Hospital (New Orleans)', 'start_paragraph_id': 1, 'start_character': 195, 'end_paragraph_id': 1, 'end_character': 212, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '7690016', 'title': 'Charity Hospital (New Orleans)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 657, 'bleu_score': 0.8095472871404351, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4298492760928318399}, 'section': 'Section::::Abstract.'}]}]