Question: who does the voice of nina on sing
[{'answer': 'Tori Kelly', 'provenance': [{'wikipedia_id': '47415762', 'title': 'Sing (2016 American film)', 'start_paragraph_id': 1, 'start_character': 317, 'end_paragraph_id': 1, 'end_character': 327, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '47415762', 'title': 'Sing (2016 American film)', 'start_paragraph_id': 18, 'start_character': 0, 'end_paragraph_id': 18, 'end_character': 99, 'bleu_score': 0.8702397637697911, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 7253310956941202901}, 'section': 'Section::::Voice cast.\n'}]}]