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

Q: 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?

A: russian revolution
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Q: According to the bible, Zaccariah was the father of which New Testament figure?

A: bible
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Q: What peninsula on the north coast of the Black Sea is connected to the mainland by the isthmus of Perekop?

A:
black sea
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