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

Ex Input:
Which singer provides the voice for Chef in South Park?

Ex Output:
chef

Ex Input:
In 1959, for which film did David Niven win his only Academy Award?

Ex Output:
david niven

Ex Input:
The city of Brest in modern day Belarus was once known as Brest-Litovsk, site of the 1918 treaty between Soviet Russia and the Central Powers. For what present day country did the word Litovsk refer?

Ex Output:
belarus