Question: who played churchill's wife in the crown
[{'answer': 'Dame Harriet Mary Walter', 'provenance': [{'wikipedia_id': '4093318', 'title': 'Harriet Walter', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 24, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '4093318', 'title': 'Harriet Walter', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 554, 'bleu_score': 0.8436238007386161, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 12094418412591703975}, 'section': 'Section::::Abstract.'}]}]