Question: who sang for meryl streep in mama mia
[{'answer': 'Meryl Streep', 'provenance': [{'wikipedia_id': '8425661', 'title': 'Mamma Mia! (film)', 'start_paragraph_id': 1, 'start_character': 512, 'end_paragraph_id': 1, 'end_character': 524, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '8425661', 'title': 'Mamma Mia! (film)', 'start_paragraph_id': 60, 'start_character': 0, 'end_paragraph_id': 60, 'end_character': 388, 'bleu_score': 0.944041853942402, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17178568789590007302}, 'section': 'Section::::Production.\n'}]}]