TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Charon is a moon which orbits which body?

SOLUTION: charon

PROBLEM: Chep Lap Kok airport is located where?

SOLUTION: hong kong international airport

PROBLEM: Which 1973 British horror film, directed by Robin Hardy starring Edward Woodward and set on a remote Scottish island, was remade in 2006, directed by Neil LaBute and starring Nicolas Cage, set on an island in Puget Sound, Washington?

SOLUTION:
robin hardy