Question: who plays the kings mother in the white princess
[{'answer': 'Michelle Fairley', 'provenance': [{'wikipedia_id': '50807741', 'title': 'The White Princess (miniseries)', 'start_paragraph_id': 57, 'start_character': 80, 'end_paragraph_id': 57, 'end_character': 96, 'bleu_score': 1.0, 'section': 'Section::::Casting.\n'}]}]