Question: where did the sword in the stone come from
[{'answer': 'Arthurian legend', 'provenance': [{'wikipedia_id': '9717', 'title': 'Excalibur', 'start_paragraph_id': 1, 'start_character': 350, 'end_paragraph_id': 1, 'end_character': 366, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'provenance': [{'wikipedia_id': '9717', 'title': 'Excalibur', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 495, 'bleu_score': 0.849478308704367, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 3262782617836023309}, 'section': 'Section::::Abstract.'}]}]