Question: when does the why don't we album come out
[{'answer': 'August 31 2018', 'provenance': [{'wikipedia_id': '54275432', 'title': "Why Don't We", 'start_paragraph_id': 4, 'start_character': 226, 'end_paragraph_id': 4, 'end_character': 241, 'bleu_score': 1.0, 'section': 'Section::::Career.:2016–present.\n'}]}, {'provenance': [{'wikipedia_id': '54275432', 'title': "Why Don't We", 'start_paragraph_id': 4, 'start_character': 0, 'end_paragraph_id': 4, 'end_character': 246, 'bleu_score': 0.560799964000116, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7187059395525863274}, 'section': 'Section::::Career.:2016–present.\n'}]}]