Question: who played the koala in the movie sing
[{'answer': 'Matthew McConaughey', 'provenance': [{'wikipedia_id': '47415762', 'title': 'Sing (2016 American film)', 'start_paragraph_id': 1, 'start_character': 205, 'end_paragraph_id': 1, 'end_character': 224, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '47415762', 'title': 'Sing (2016 American film)', 'start_paragraph_id': 12, 'start_character': 0, 'end_paragraph_id': 12, 'end_character': 143, 'bleu_score': 0.9067110266941041, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3321929142170022265}, 'section': 'Section::::Voice cast.\n'}]}]