Question: when did all about that base come out
[{'answer': 'June 30 , 2014', 'provenance': [{'wikipedia_id': '43359294', 'title': 'All About That Bass', 'start_paragraph_id': 9, 'start_character': 229, 'end_paragraph_id': 9, 'end_character': 243, 'bleu_score': 1.0, 'section': 'Section::::Release.\n'}]}, {'provenance': [{'wikipedia_id': '43359294', 'title': 'All About That Bass', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 492, 'bleu_score': 0.5682004985122371, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 6539026818471922392}, 'section': 'Section::::Abstract.'}]}]