Question: what date did riverdale season 1 start airing on tv
[{'answer': 'January 26 , 2017', 'provenance': [{'wikipedia_id': '53276188', 'title': 'List of Riverdale episodes', 'start_paragraph_id': 1, 'start_character': 631, 'end_paragraph_id': 1, 'end_character': 648, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]