Question: who played the grandma in mamma mia here we go again
[{'answer': 'Cher', 'provenance': [{'wikipedia_id': '54535911', 'title': 'Mamma Mia! Here We Go Again', 'start_paragraph_id': 1, 'start_character': 601, 'end_paragraph_id': 1, 'end_character': 605, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '54535911', 'title': 'Mamma Mia! Here We Go Again', 'start_paragraph_id': 27, 'start_character': 0, 'end_paragraph_id': 27, 'end_character': 76, 'bleu_score': 0.592303307202324, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1320401233164822009}, 'section': 'Section::::Cast.\n'}]}]