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

Ex Input:
Which play and film was adapted from a story by Christopher Isherwood and later adapted as the musical and film Cabaret?

Ex Output:
cabaret


Ex Input:
Can you name the final movie directed by Alfred Hitchcock?

Ex Output:
alfred hitchcock


Ex Input:
Which city is served by Chopin Airport?

Ex Output:

warsaw chopin airport