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

[Q]: Which form of dementia is named after a German psychiatrist who first described it in 1906?
[A]: dementia

[Q]: Who composed 'Eine Kleine Nachtmusik' in the 18th Century?
[A]: eine kleine nachtmusik

[Q]: What country borders with Belgium, France and Germany?
[A]:
belgium