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

Input: Consider Input: Established in 1919, which is the world's oldest surviving airline?

Output: airline


Input: Consider Input: Which novel by A J Cronin is credited with laying down the foundation in Great Britain for the introduction of the National Health Service?

Output: a. j. cronin


Input: Consider Input: Who played the role of Becky Sharp in the 2004 film 'Vanity Fair'?


Output: becky sharp