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

[EX Q]: What breed of dog is Marmaduke in the newspaper cartoon strip of that name?
[EX A]: dog

[EX Q]: Physics. What is the SI unit for amount of substance?
[EX A]: amount of substance

[EX Q]: Which company makes 'Budweiser' beer?
[EX A]:
budweiser