Question: when did the first episode of the flash come out
[{'answer': 'October 7 , 2014', 'provenance': [{'wikipedia_id': '41844524', 'title': 'The Flash (2014 TV series)', 'start_paragraph_id': 46, 'start_character': 829, 'end_paragraph_id': 46, 'end_character': 845, 'bleu_score': 1.0, 'section': 'Section::::Reception.:Ratings.\n'}]}, {'provenance': [{'wikipedia_id': '41844524', 'title': 'The Flash (2014 TV series)', 'start_paragraph_id': 3, 'start_character': 0, 'end_paragraph_id': 3, 'end_character': 537, 'bleu_score': 0.8968349716112191, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11505344686785001011}, 'section': 'Section::::Abstract.'}]}]