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

Ex Input:
Laurence Olivier directed and starred in a 1944 film, which began in the Globe Theatre and then gradually shifted to a realistic evocation of the Battle of Agincourt, which was adapted from which one of Shakespeare's plays?

Ex Output:
battle of agincourt


Ex Input:
The wine-producing region of Hunter Valley is in which Australian state?

Ex Output:
australia


Ex Input:
The CN Tower is in which Canadian city?

Ex Output:

cn tower