Question: who plays miss minchin in a little princess
[{'answer': 'Mary Nash', 'provenance': [{'wikipedia_id': '3343805', 'title': 'The Little Princess (1939 film)', 'start_paragraph_id': 17, 'start_character': 12, 'end_paragraph_id': 17, 'end_character': 21, 'bleu_score': 1.0, 'section': 'Section::::Cast.\n'}]}, {'provenance': [{'wikipedia_id': '3343805', 'title': 'The Little Princess (1939 film)', 'start_paragraph_id': 17, 'start_character': 0, 'end_paragraph_id': 17, 'end_character': 39, 'bleu_score': 0.6147881529512641, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 11162353047874459980}, 'section': 'Section::::Cast.\n'}]}]