Question: when was smallpox introduced to the new world
[{'answer': 'the early 16th century', 'provenance': [{'wikipedia_id': '20790125', 'title': 'History of smallpox', 'start_paragraph_id': 18, 'start_character': 438, 'end_paragraph_id': 18, 'end_character': 460, 'bleu_score': 1.0, 'section': 'Section::::Epidemics in the Americas.\n'}]}, {'provenance': [{'wikipedia_id': '20790125', 'title': 'History of smallpox', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 516, 'bleu_score': 0.9149783580130991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 966140486717050737}, 'section': 'Section::::Epidemics in the Americas.\n'}]}]