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

[Q]: Denzil Washington played which black militant leader in the 1992 film of the same name?
[A]: denzel washington

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

[Q]: What SI unit (International System of Units) of measurement is defined as The amount of substance that contains an equal number of elementary entities as there are atoms in 0.012kg of the isotope carbon-12?
[A]:
amount of substance