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

Ex Input:
What is the county town of Derbyshire?

Ex Output:
derbyshire

Ex Input:
Which actress played Arwen in the trilogy of films?

Ex Output:
arwen

Ex Input:
Having been the M.P. for this constituency since 1970, Labour M.P. Dennis Skinner has acquired the nickname, The Beast of ---- where?

Ex Output:
dennis skinner