How Many Harry Potter movies did Alfonso Cuarón direct?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q216930', 'id': 0, 'label': 'Harry Potter'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q28028', 'id': 1, 'label': 'Alfonso Cuarón'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q102448', 'id': 2, 'label': 'Harry Potter and the Prisoner of Azkaban'}], 'links': [{'name_': 'P57', 'source': 0, 'target': 1, 'label': 'director'}, {'name_': 'P527', 'source': 0, 'target': 2, 'label': 'has part(s)'}]}