Definition: Given a question, generate a paraphrase of that question wihout changing the meaning of it. Your answer should reword the given sentence, but not add information to it or remove information from it. The answer to your question should be the same as the answer to the original question.
Input: Question: in what film was it revealed that darth vader was luke skywalker's father?

luke skywalker finds out that darth vador is his father in what movie?