Which city uses zero stop signs for cars?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q956', 'id': 0, 'label': 'Peking'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q515', 'id': 1, 'label': 'city'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q1486', 'id': 2, 'label': 'Buenos Aires'}, {'type': 'INTERNAL', 'name_': 'Q285783', 'id': 3, 'label': 'intersection'}, {'type': 'INTERNAL', 'name_': 'Q8004', 'id': 4, 'label': 'traffic light'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q250429', 'id': 5, 'label': 'stop sign'}, {'type': 'INTERNAL', 'name_': 'Q10508956', 'id': 6, 'label': 'Caishikou Execution Grounds'}, {'type': 'INTERNAL', 'name_': 'Q111694710', 'id': 7, 'label': None}], 'links': [{'name_': 'P31', 'source': 0, 'target': 1, 'label': 'instance of'}, {'name_': 'P190', 'source': 0, 'target': 2, 'label': 'twinned administrative body'}, {'name_': 'P4330', 'source': 3, 'target': 4, 'label': 'contains'}, {'name_': 'P4330', 'source': 3, 'target': 5, 'label': 'contains'}, {'name_': 'P131', 'source': 6, 'target': 0, 'label': 'located in the administrative territorial entity'}, {'name_': 'P31', 'source': 6, 'target': 3, 'label': 'instance of'}, {'name_': 'P131', 'source': 7, 'target': 2, 'label': 'located in the administrative territorial entity'}, {'name_': 'P180', 'source': 7, 'target': 4, 'label': 'depicts'}]}