How many wives did Joseph Stalin have?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q855', 'id': 0, 'label': 'Joseph Stalin'}, {'type': 'INTERNAL', 'name_': 'Q79854', 'id': 1, 'label': 'Communist Party of the Soviet Union'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q211930', 'id': 2, 'label': 'Marxism–Leninism'}], 'links': [{'name_': 'P488', 'source': 1, 'target': 0, 'label': 'chairperson'}, {'name_': 'P1142', 'source': 1, 'target': 2, 'label': 'political ideology'}]}