Question: who plays mary poppins in the new film
[{'answer': 'Emily Blunt', 'provenance': [{'wikipedia_id': '47886328', 'title': 'Mary Poppins Returns', 'start_paragraph_id': 1, 'start_character': 299, 'end_paragraph_id': 1, 'end_character': 310, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}]