Which dynasty built the Great Wall of China?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q148', 'id': 0, 'label': "People's Republic of China"}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q43407', 'id': 1, 'label': 'Shandong'}, {'type': 'INTERNAL', 'name_': 'Q212610', 'id': 2, 'label': 'Mutianyu'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q12501', 'id': 3, 'label': 'Great Wall of China'}], 'links': [{'name_': 'P17', 'source': 0, 'target': 0, 'label': 'country'}, {'name_': 'P150', 'source': 0, 'target': 1, 'label': 'contains the administrative territorial entity'}, {'name_': 'P17', 'source': 2, 'target': 0, 'label': 'country'}, {'name_': 'P361', 'source': 2, 'target': 3, 'label': 'part of'}]}