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

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

What city is closest to Copacabana beach?
copacabana, rio de janeiro

Who plays the main villain in `Die Hard: With A Vengeance`?

die hard with a vengeance