TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Which is the only film of the fantasy genre ever to win the best picture Oscar - full name required?

SOLUTION: academy award for best picture

PROBLEM: What is the only nation state of the Commonwealth of Nations on the mainland of South America?

SOLUTION: commonwealth of nations

PROBLEM: Which European city is served by Domodedovo Airport?

SOLUTION:
domodedovo international airport