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

[Q]: Aragon and Castile joined to form which country?
[A]: aragon


[Q]: In which wars did the battles of Towton and Barnet take place?
[A]: battle of barnet


[Q]: Who wrote the novel The Betsy?
[A]:
betsy