Question: when was back to you made by selena gomez
[{'answer': 'May 10 , 2018', 'provenance': [{'wikipedia_id': '57287293', 'title': 'Back to You (Selena Gomez song)', 'start_paragraph_id': 9, 'start_character': 83, 'end_paragraph_id': 9, 'end_character': 96, 'bleu_score': 1.0, 'section': 'Section::::Music video.\n'}]}]