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: In Greek mythology who was the mother of Zeus, Poseidon and Hades?

Answer: rhea


Question: What movie was about a wicked smart mathematician who worked as a janitor?

Answer: good will hunting


Question: What is the title of the final Harry Potter book?

Answer:
harry potter and the deathly hallows