Question: where did the stone for the tower of london come from
[{'answer': 'Kentish', 'provenance': [{'wikipedia_id': '31165', 'title': 'Tower of London', 'start_paragraph_id': 10, 'start_character': 30, 'end_paragraph_id': 10, 'end_character': 37, 'bleu_score': 1.0, 'section': 'Section::::Architecture.:White Tower.\n'}]}, {'answer': 'northern France', 'provenance': [{'wikipedia_id': '31165', 'title': 'Tower of London', 'start_paragraph_id': 10, 'start_character': 122, 'end_paragraph_id': 10, 'end_character': 137, 'bleu_score': 1.0, 'section': 'Section::::Architecture.:White Tower.\n'}]}, {'provenance': [{'wikipedia_id': '31165', 'title': 'Tower of London', 'start_paragraph_id': 10, 'start_character': 0, 'end_paragraph_id': 10, 'end_character': 460, 'bleu_score': 0.97451705556073, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 13729783393343885109}, 'section': 'Section::::Architecture.:White Tower.\n'}]}]