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

Q: Where is David Cameron's Oxfordshire constituency?

A: david cameron
****
Q: The Battle of Poltava in 1709 was a victory by Peter the Great over which state?

A: battle of poltava
****
Q: In which country was former motor racing driver Ayrton Senna born?

A:
senna
****