Question: when did the show once upon a time start
[{'answer': 'October 23 , 2011', 'provenance': [{'wikipedia_id': '4704229', 'title': 'Once Upon a Time (TV series)', 'start_paragraph_id': 79, 'start_character': 171, 'end_paragraph_id': 79, 'end_character': 188, 'bleu_score': 1.0, 'section': 'Section::::Broadcast.\n'}]}, {'provenance': [{'wikipedia_id': '4704229', 'title': 'Once Upon a Time (TV series)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 600, 'bleu_score': 0.791822305225344, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 5037744810063313185}, 'section': 'Section::::Abstract.'}]}]