Question: when did sign of the times come out
[{'answer': '7 April 2017', 'provenance': [{'wikipedia_id': '53654561', 'title': 'Sign of the Times (Harry Styles song)', 'start_paragraph_id': 1, 'start_character': 156, 'end_paragraph_id': 1, 'end_character': 168, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]