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

Ex Input:
The Church of the Savior on Spilled Blood, built on the site of the assassination of Tsar Alexander II, is in which Russian city?

Ex Output:
church of the savior on blood


Ex Input:
In the film `Breakfast at Tiffanys`, what is the name of Audrey Hepburn`s character`s cat ?

Ex Output:
breakfast at tiffany's


Ex Input:
What horse won the 2009 Grand National?

Ex Output:

2009 grand national