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


question:
Physics. What is the SI unit for amount of substance?
answer:
amount of substance


question:
What make of motor car was the Dolomite ?
answer:

triumph dolomite