Which Star Wars Original Trilogy movies were not directed by George Lucas?
{'directed': True, 'multigraph': False, 'graph': {}, 'nodes': [{'type': 'INTERNAL', 'name_': 'Q462', 'id': 0, 'label': 'Star Wars'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q38222', 'id': 1, 'label': 'George Lucas'}, {'type': 'QUESTIONS_ENTITY', 'name_': 'Q25540859', 'id': 2, 'label': 'Star Wars original trilogy'}, {'type': 'ANSWER_CANDIDATE_ENTITY', 'name_': 'Q64729658', 'id': 3, 'label': 'Star Wars: The Skywalker Saga'}], 'links': [{'name_': 'P170', 'source': 0, 'target': 1, 'label': 'creator'}, {'name_': 'P8345', 'source': 2, 'target': 0, 'label': 'media franchise'}, {'name_': 'P58', 'source': 2, 'target': 1, 'label': 'screenwriter'}, {'name_': 'P361', 'source': 2, 'target': 3, 'label': 'part of'}, {'name_': 'P8345', 'source': 3, 'target': 0, 'label': 'media franchise'}, {'name_': 'P527', 'source': 3, 'target': 2, 'label': 'has part(s)'}]}