Question: when was the first episode of supernatural aired
[{'answer': 'September 13 , 2005', 'provenance': [{'wikipedia_id': '18569389', 'title': 'Supernatural (season 1)', 'start_paragraph_id': 1, 'start_character': 116, 'end_paragraph_id': 1, 'end_character': 135, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '18569389', 'title': 'Supernatural (season 1)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 774, 'bleu_score': 0.912198388982669, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17892020904119396356}, 'section': 'Section::::Abstract.'}]}]