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]: Which 'Coronation Street' character was played for may years by Jean Alexander?
[EX A]: jean alexander

[EX Q]: In which Dickens novel do the characters 'Gaffer Hexam', 'John Harmon', and 'Bradley Headstone'?
[EX A]:
charles dickens