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

Which form of dementia is named after a German psychiatrist who first described it in 1906?
dementia

Which Frenchman composed Clair de lune, the famous third movement of Suite bergamasque?
suite bergamasque

Opened in 1998, accessible usually only by air, and continually in permafrost, the EKATI Diamond Mine is in which country?

ekati diamond mine