Question: who does otto's voice on the simpsons
[{'answer': 'Shearer', 'provenance': [{'wikipedia_id': '14331', 'title': 'Harry Shearer', 'start_paragraph_id': 0, 'start_character': 6, 'end_paragraph_id': 0, 'end_character': 13, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '14331', 'title': 'Harry Shearer', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 1512, 'bleu_score': 0.9619068611834851, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 15318778328117866153}, 'section': 'Section::::Career.:"The Simpsons".\n'}]}]