How many universities are located in Oxford?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q34433', 'id': 0, 'label': 'University of Oxford'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q2007225', 'id': 1, 'label': 'Wolfson College'}], 'links': [{'name_': 'P361', 'source': 1, 'target': 0, 'label': 'part of'}]}