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: James Dearden wrote which book, made into a famous film directed by Adrian Lyne, in 1987?

SOLUTION: adrian lyne

PROBLEM: Who had their biggest British hit with 'Don't Leave Me This Way' in 1986?

SOLUTION:
don't leave me this way