Question: who sang for powerline in a goofy movie
[{'answer': 'Bobby Brown', 'provenance': [{'wikipedia_id': '155785', 'title': 'A Goofy Movie', 'start_paragraph_id': 11, 'start_character': 982, 'end_paragraph_id': 11, 'end_character': 993, 'bleu_score': 1.0, 'section': 'Section::::Production.\n'}]}, {'answer': 'Tevin Campbell .', 'provenance': [{'wikipedia_id': '155785', 'title': 'A Goofy Movie', 'start_paragraph_id': 33, 'start_character': 406, 'end_paragraph_id': 33, 'end_character': 428, 'bleu_score': 1.0, 'section': 'Section::::Legacy.\n'}]}]