Question: who did the voice of mumble in happy feet
[{'answer': 'Elijah Wood', 'provenance': [{'wikipedia_id': '1499348', 'title': 'Happy Feet', 'start_paragraph_id': 1, 'start_character': 135, 'end_paragraph_id': 1, 'end_character': 146, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]