Question: who plays the voice of powerline in a goofy movie
[{'answer': 'Tevin Campbell', 'provenance': [{'wikipedia_id': '155785', 'title': 'A Goofy Movie', 'start_paragraph_id': 2, 'start_character': 483, 'end_paragraph_id': 2, 'end_character': 497, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]