Question: who plays the great great grandmother in coco
[{'answer': 'Alanna Ubach', 'provenance': [{'wikipedia_id': '47532661', 'title': 'Coco (2017 film)', 'start_paragraph_id': 1, 'start_character': 312, 'end_paragraph_id': 1, 'end_character': 324, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '47532661', 'title': 'Coco (2017 film)', 'start_paragraph_id': 17, 'start_character': 0, 'end_paragraph_id': 17, 'end_character': 141, 'bleu_score': 0.748885616256302, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 14945512301187653380}, 'section': 'Section::::Cast.\n'}]}]