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

[EX Q]: Who wrote `20,000 Leagues Under The Sea`?
[EX A]: 20,000 leagues under the sea

[EX Q]: Devil's Tower National Monument in Wyoming, USA features prominently in which landmark 1977 science fiction film?
[EX A]: devils tower

[EX Q]: What beings come from the planet Cybertron?
[EX A]:
cybertron