Question: when did the maid of the mist begin
[{'answer': 'September 18 , 1846', 'provenance': [{'wikipedia_id': '694973', 'title': 'Maid of the Mist', 'start_paragraph_id': 3, 'start_character': 192, 'end_paragraph_id': 3, 'end_character': 211, 'bleu_score': 1.0, 'section': 'Section::::History.\n'}]}, {'provenance': [{'wikipedia_id': '694973', 'title': 'Maid of the Mist', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 505, 'bleu_score': 0.9061298396341001, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4827745383262101368}, 'section': 'Section::::History.\n'}]}]