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

[EX Q]: 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 A]: church of the savior on blood

[EX Q]: What is the second book of the Bible?
[EX A]: bible

[EX Q]: Taking place on March 7th 1814, The Battle of Craonne took place in which country?
[EX A]:
battle of craonne