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

[Q]: The Battle of Poltava in 1709 was a victory by Peter the Great over which state?
[A]: battle of poltava


[Q]: Which singer/songwriter, who began releasing hit singles in 1958, has had 3 albums (The Definitive Collection, Waking Up Is Hard to Do & The Music of My Life) on Billboard's Top 200 Albums chart between 2007 & 2010?
[A]: the definitive collection


[Q]: Titania, Miranda and Bianca are all moons of which planet in our solar system?
[A]:
solar system