Question: who does maria vacratsis play in mamma mia
[{'answer': 'Sofia', 'provenance': [{'wikipedia_id': '54535911', 'title': 'Mamma Mia! Here We Go Again', 'start_paragraph_id': 9, 'start_character': 457, 'end_paragraph_id': 9, 'end_character': 462, 'bleu_score': 1.0, 'section': 'Section::::Plot.\n'}]}]