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

What nationality was Che Guevara?
che guevara

Who was Minister-Chairman of the Russian Provisional Government and Prime Minister of Russia from 21 July 1917 (following the abdication of Tsar Nicholas II) to 8 November 1917 (the Bolshevik revolution), who is buried in Putney Vale Cemetery, London?
russian revolution

The cities of Philadelphia, Pittsburgh, Allentown, Erie, Reading, Scranton, Bethlehem, Altoona and Harrisburg are in which US state?

altoona, pennsylvania