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

The towns od Grimsby and Cleethorpes are in which English county?
grimsby

Which city has sports teams known as the 'Maple Leafs' and the 'Blue Jays'?
toronto blue jays

Who was the leader of the Bolshevik Revolution in Russia in 1917?

october revolution