Question: what is the release date for flash season 4
[{'answer': 'January 8 , 2017'}, {'provenance': [{'wikipedia_id': '42718506', 'title': 'List of The Flash episodes', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 540, 'bleu_score': 0.630963836226033, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16026640517112239593}, 'section': 'Section::::Abstract.'}]}]