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 headquarters building of which government agency is known as 'The Doughnut' due to its shape?

SOLUTION: the doughnut

PROBLEM: What is the name of the co-founder of Apple Computers who died in October 2011?

SOLUTION: apple inc.

PROBLEM: Who wrote the 2006 best seller 'The Book Thief' set in Munich during World War II?

SOLUTION:
the book thief