Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Example Input: Grace Anna Goodhue was the wife of which US President?
Example Output: grace coolidge

Example Input: What famous novel invented the terms thoughtcrime and doubleplusgood?
Example Output: newspeak

Example Input: Which city in the Zou Department of The People's Republic of Benin was formerly the capital of the ancient kingdom of Dahomey?
Example Output:
dahomey