Question: where was the first documented case of polio
[{'answer': '1840', 'provenance': [{'wikipedia_id': '11110672', 'title': 'History of polio', 'start_paragraph_id': 5, 'start_character': 596, 'end_paragraph_id': 5, 'end_character': 600, 'bleu_score': 1.0, 'section': 'Section::::Early history.\n'}]}, {'provenance': [{'wikipedia_id': '11110672', 'title': 'History of polio', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 898, 'bleu_score': 0.9851290761715561, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16136618026277019243}, 'section': 'Section::::Early history.\n'}]}]