instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
The Church of the Savior on Spilled Blood, built on the site of the assassination of Tsar Alexander II, is in which Russian city?
answer:
church of the savior on blood


question:
In which Indian city is Eden Gardens, the second largest test cricket ground in the world?
answer:
eden gardens


question:
Which Irish swimmer, accused by the Americans of cheating, won 3 Gold medals at the 1996 Olympics?
answer:

1996 summer olympics