Which Alfonso Cuarón movie did not win an Oscar in 2018 for Best Picture?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q102427', 'id': 0, 'label': 'Academy Award for Best Picture'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q222738', 'id': 1, 'label': 'National Autonomous University of Mexico'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q28028', 'id': 2, 'label': 'Alfonso Cuarón'}], 'links': [{'name_': 'P1411', 'source': 2, 'target': 0, 'label': 'nominated for'}, {'name_': 'P69', 'source': 2, 'target': 1, 'label': 'educated at'}]}