Question: who did the original voice for mickey mouse
[{'answer': 'Walt Disney', 'provenance': [{'wikipedia_id': '20859', 'title': 'Mickey Mouse', 'start_paragraph_id': 1, 'start_character': 71, 'end_paragraph_id': 1, 'end_character': 82, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]