Question: when did blue exorcist season 2 come out
[{'answer': 'January 7 , 2017', 'provenance': [{'wikipedia_id': '31537978', 'title': 'List of Blue Exorcist episodes', 'start_paragraph_id': 4, 'start_character': 65, 'end_paragraph_id': 4, 'end_character': 81, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]