Question: when does season 3 of super girl start
[{'answer': 'October 9 , 2017', 'provenance': [{'wikipedia_id': '45167756', 'title': 'Supergirl (TV series)', 'start_paragraph_id': 31, 'start_character': 83, 'end_paragraph_id': 31, 'end_character': 99, 'bleu_score': 1.0, 'section': 'Section::::Production.:Development.\n'}]}]