What is the name of the county that the city of Pittsburgh, Pennsylvania is located in?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q1342', 'id': 0, 'label': 'Pittsburgh'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q1184857', 'id': 1, 'label': 'Wilkinsburg'}], 'links': [{'name_': 'P47', 'source': 0, 'target': 1, 'label': 'shares border with'}]}