Question: when did why dont we release their first song
[{'answer': 'October 7 , 2016', 'provenance': [{'wikipedia_id': '54275432', 'title': "Why Don't We", 'start_paragraph_id': 5, 'start_character': 3, 'end_paragraph_id': 5, 'end_character': 19, 'bleu_score': 1.0, 'section': 'Section::::Career.:2016–present.\n'}]}, {'provenance': [{'wikipedia_id': '54275432', 'title': "Why Don't We", 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 511, 'bleu_score': 0.977397480575333, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9878131135017124871}, 'section': 'Section::::Career.:2016–present.\n'}]}]