What ancient civilization invented paper?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q6173448', 'id': 0, 'label': 'Wikipedia:Vital articles/Level/4'}, {'type': 'INTERNAL', 'name_': 'Q11772', 'id': 1, 'label': 'Ancient Greece'}, {'type': 'INTERNAL', 'name_': 'Q28823', 'id': 2, 'label': 'textile'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q910035', 'id': 3, 'label': 'flammability'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q11472', 'id': 4, 'label': 'paper'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q28171280', 'id': 5, 'label': 'ancient civilization'}], 'links': [{'name_': 'P5008', 'source': 1, 'target': 0, 'label': 'on focus list of Wikimedia project'}, {'name_': 'P31', 'source': 1, 'target': 5, 'label': 'instance of'}, {'name_': 'P5008', 'source': 2, 'target': 0, 'label': 'on focus list of Wikimedia project'}, {'name_': 'P1552', 'source': 2, 'target': 3, 'label': 'has characteristic'}, {'name_': 'P5008', 'source': 4, 'target': 0, 'label': 'on focus list of Wikimedia project'}, {'name_': 'P1552', 'source': 4, 'target': 3, 'label': 'has characteristic'}]}