Question: who changed the royal family name to windsor
[{'answer': 'George V', 'provenance': [{'wikipedia_id': '172905', 'title': 'House of Windsor', 'start_paragraph_id': 5, 'start_character': 34, 'end_paragraph_id': 5, 'end_character': 42, 'bleu_score': 1.0, 'section': 'Section::::Background.\n'}]}, {'provenance': [{'wikipedia_id': '172905', 'title': 'House of Windsor', 'start_paragraph_id': 5, 'start_character': 0, 'end_paragraph_id': 5, 'end_character': 938, 'bleu_score': 0.9017046031881991, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 4923290031896695070}, 'section': 'Section::::Background.\n'}]}]