Question: who sings why you gotta be so mean
[{'answer': 'Taylor Swift', 'provenance': [{'wikipedia_id': '29264375', 'title': 'Mean (song)', 'start_paragraph_id': 1, 'start_character': 68, 'end_paragraph_id': 1, 'end_character': 80, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '29264375', 'title': 'Mean (song)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 609, 'bleu_score': 0.9806740509884301, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9291895952977680126}, 'section': 'Section::::Abstract.'}]}]