TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Who wrote the novel 'Brideshead Revisited'?

SOLUTION: brideshead revisited

PROBLEM: Which singer played Billie Holiday in the 1972 film `Lady Sings The Blues`?

SOLUTION: lady sings the blues

PROBLEM: Which four letter word beginning with U is the pigmented layer of the eye, lying beneath the sclera and cornea, and comprising of the iris, choroid and ciliary body?

SOLUTION:
ciliary body