Given an trivia question precisely answer the question with a word/phrase/name. External resources such as Wikipedia could be used to obtain the facts.
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Question: Which actor plays the title role in the Harry Potter films?

Answer: daniel radcliffe


Question: Who was the subject of the film I'm Not There, and did not appear in it?

Answer: bob dylan


Question: What is the name of Joseph Heller's best known novel?

Answer:
catch-22