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

Ex 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?

Ex Output:
a. j. cronin


Ex Input:
Which English king was married to Eleanor of Castile?

Ex Output:
eleanor of castile


Ex Input:
Driving Home For Christmas was a 1988 hit single for which singer?

Ex Output:

driving home for christmas