TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: The rivers Axe, Brue, Cary, Parrett, eta, are in which English county?

SOLUTION: castle cary

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

SOLUTION: dementia

PROBLEM: Who played gangster Don Logan in the 2000 film Sexy Beast?

SOLUTION:
don logan