TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Established in 1919, which is the world's oldest surviving airline?

SOLUTION: airline

PROBLEM: The French wine growing areas of Macon, Beaujolais and Chablis are in which region?

SOLUTION: macon

PROBLEM: Alec Guinness played Lieutenant Colonel Nicholson in which 1957 World War II film?

SOLUTION:
alec guinness