Which Star Wars prequel was the first appearance of Anakin Skywalker?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'QUESTIONS_ENTITY', 'name_': 'Q462', 'id': 0, 'label': 'Star Wars'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q51752', 'id': 1, 'label': 'Anakin Skywalker'}, {'type': 'INTERNAL', 'name_': 'Q165713', 'id': 2, 'label': 'Star Wars: Episode I – The Phantom Menace'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q3497005', 'id': 3, 'label': 'Star Wars Episode I: The Phantom Menace'}], 'links': [{'name_': 'P8345', 'source': 2, 'target': 0, 'label': 'media franchise'}, {'name_': 'P674', 'source': 2, 'target': 1, 'label': 'characters'}, {'name_': 'P4969', 'source': 2, 'target': 3, 'label': 'derivative work'}, {'name_': 'P8345', 'source': 3, 'target': 0, 'label': 'media franchise'}, {'name_': 'P144', 'source': 3, 'target': 2, 'label': 'based on'}]}