TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Which instrument was Benny Goodman famous for playing?

SOLUTION: benny goodman

PROBLEM: Besides the Caucasus, what mountain range forms the border of Europe and Asia?

SOLUTION: asia

PROBLEM: Where is the area of 127,000 square kilometres (49,000 sq miles) in central South Australia, where public are not admitted under Australian Defence Force regulations?

SOLUTION:
australia