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

Q: Which hero of science fiction was created by Alex Raymond?

A: alex raymond
****
Q: What name was given to the 1950-60s mainstream country music style of artists including Patsy Cline, Tammy Wynette, Jim Reeves, and Charlie Rich?

A: charlie rich
****
Q: In which Libyan city, his birthplace, was Colonel Gaddafi captured and killed in October 2011?

A:
muammar gaddafi
****