Question: when did ebola first come to the us
[{'answer': 'September 2014', 'provenance': [{'wikipedia_id': '44000088', 'title': 'Ebola virus cases in the United States', 'start_paragraph_id': 1, 'start_character': 322, 'end_paragraph_id': 1, 'end_character': 336, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '44000088', 'title': 'Ebola virus cases in the United States', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 633, 'bleu_score': 0.9804854598160591, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11306968865130688933}, 'section': 'Section::::Abstract.'}]}]