Question: who played the kangaroo in horton hears a who
[{'answer': 'Carol Burnett', 'provenance': [{'wikipedia_id': '6002183', 'title': 'Horton Hears a Who! (film)', 'start_paragraph_id': 1, 'start_character': 502, 'end_paragraph_id': 1, 'end_character': 515, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '6002183', 'title': 'Horton Hears a Who! (film)', 'start_paragraph_id': 11, 'start_character': 12, 'end_paragraph_id': 11, 'end_character': 154, 'bleu_score': 0.823633292144042, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14561636562211248190}, 'section': 'Section::::Voice cast.\n'}]}]