Question: what is the name of happy feet's main character
[{'answer': 'Mumble', 'provenance': [{'wikipedia_id': '1499348', 'title': 'Happy Feet', 'start_paragraph_id': 5, 'start_character': 462, 'end_paragraph_id': 5, 'end_character': 468, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}, {'provenance': [{'wikipedia_id': '1499348', 'title': 'Happy Feet', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 835, 'bleu_score': 0.9867102250666441, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 16019671184767699405}, 'section': 'Section::::Plot.\n'}]}]