Question: who plays young donna in mama mia 2
[{'answer': 'Lily James', 'provenance': [{'wikipedia_id': '54535911', 'title': 'Mamma Mia! Here We Go Again', 'start_paragraph_id': 1, 'start_character': 488, 'end_paragraph_id': 1, 'end_character': 498, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]