Question: who played mary poppins in the 1964 film
[{'answer': 'Julie Andrews', 'provenance': [{'wikipedia_id': '77856', 'title': 'Mary Poppins (film)', 'start_paragraph_id': 1, 'start_character': 328, 'end_paragraph_id': 1, 'end_character': 341, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '77856', 'title': 'Mary Poppins (film)', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 702, 'bleu_score': 0.943803721160212, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 8977388734734779844}, 'section': 'Section::::Abstract.'}]}]