Question: where is the original magna carta kept today
[{'answer': 'the British Library', 'provenance': [{'wikipedia_id': '20958', 'title': 'Magna Carta', 'start_paragraph_id': 3, 'start_character': 461, 'end_paragraph_id': 3, 'end_character': 480, 'bleu_score': 1.0, 'section': 'Section::::Abstract.'}]}, {'answer': 'the cathedrals of Lincoln and Salisbury'}, {'provenance': [{'wikipedia_id': '20958', 'title': 'Magna Carta', 'start_paragraph_id': 3, 'start_character': 361, 'end_paragraph_id': 3, 'end_character': 1357, 'bleu_score': 0.91757082336311, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 9612218123640980184}, 'section': 'Section::::Abstract.'}]}]