Question: when was malaria eradicated from the united states
[{'answer': '1951', 'provenance': [{'wikipedia_id': '30993607', 'title': 'National Malaria Eradication Program', 'start_paragraph_id': 1, 'start_character': 214, 'end_paragraph_id': 1, 'end_character': 218, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '30993607', 'title': 'National Malaria Eradication Program', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 218, 'bleu_score': 0.7408116562614601, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3162063375660720699}, 'section': 'Section::::Abstract.'}]}]