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

Ex Input:
Devil's Tower National Monument in Wyoming, USA features prominently in which landmark 1977 science fiction film?

Ex Output:
devils tower


Ex Input:
What is the nationality of Chelsy Davy, former girlfriend of Prince Harry?

Ex Output:
chelsy davy


Ex Input:
Who was in all of these films: Alfie, The Man Who Would Be King, Educating Rita, Little Voice, Batman Begins, The Dark Knight, Last Orders and The Quiet American?

Ex Output:

alfie