Question: when did this season of american horror story start
[{'answer': 'September 5 , 2017', 'provenance': [{'wikipedia_id': '31227103', 'title': 'American Horror Story', 'start_paragraph_id': 72, 'start_character': 743, 'end_paragraph_id': 72, 'end_character': 761, 'bleu_score': 1.0, 'section': 'Section::::Broadcast.\n'}]}]