Question: the magna carta only gave rights to free people. who was not free in medieval england
[{'answer': 'serfs', 'provenance': [{'wikipedia_id': '20958', 'title': 'Magna Carta', 'start_paragraph_id': 15, 'start_character': 567, 'end_paragraph_id': 15, 'end_character': 572, 'bleu_score': 1.0, 'section': 'Section::::History.:13th century.:Great Charter of 1215.\n'}]}, {'provenance': [{'wikipedia_id': '20958', 'title': 'Magna Carta', 'start_paragraph_id': 15, 'start_character': 0, 'end_paragraph_id': 15, 'end_character': 871, 'bleu_score': 0.9855586187885531, 'meta': {'yes_no_answer': 'NONE', 'annotation_id': 1132650359084458435}, 'section': 'Section::::History.:13th century.:Great Charter of 1215.\n'}]}]