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

[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?
[A]: church of the savior on blood


[Q]: The headquarters building of which government agency is known as 'The Doughnut' due to its shape?
[A]: the doughnut


[Q]: The Primes and The Distants merged to form what group?
[A]:
the distants