Question: when was the magna carta signed and who was it intended to protect
[{'answer': '15 June 1215'}, {'answer': 'the protection of church rights', 'provenance': [{'wikipedia_id': '20958', 'title': 'Magna Carta', 'start_paragraph_id': 15, 'start_character': 231, 'end_paragraph_id': 15, 'end_character': 262, 'bleu_score': 1.0, 'section': 'Section::::History.:13th century.:Great Charter of 1215.\n'}]}, {'answer': 'protection for the barons from illegal imprisonment'}, {'provenance': [{'wikipedia_id': '20958', 'title': 'Magna Carta', 'start_paragraph_id': 1, 'start_character': 0, 'end_paragraph_id': 1, 'end_character': 841, 'bleu_score': 0.51013510948633, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 17059988711547253724}, 'section': 'Section::::Abstract.'}]}]