Question: when was the last time someone had smallpox
[{'answer': '26 October 1977', 'provenance': [{'wikipedia_id': '16829895', 'title': 'Smallpox', 'start_paragraph_id': 72, 'start_character': 655, 'end_paragraph_id': 72, 'end_character': 670, 'bleu_score': 1.0, 'section': 'Section::::History.:Eradication.\n'}]}, {'provenance': [{'wikipedia_id': '16829895', 'title': 'Smallpox', 'start_paragraph_id': 72, 'start_character': 0, 'end_paragraph_id': 72, 'end_character': 822, 'bleu_score': 0.984789766484456, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12926352723291631758}, 'section': 'Section::::History.:Eradication.\n'}]}]