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

Allopurinol is typically prescribed for which illness?
allopurinol

Who was the first person to sign the American Declaration of Independence?
united states declaration of independence

From which Daphne DuMaurier book is the opening line 'Last night I dreamt I went to Manderlay again'?

daphne du maurier