instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Chep Lap Kok airport is located where?
answer:
hong kong international airport


question:
Which English comedian has joined Amanda Holden as one of the judges on the current series of 'Britain's Got Talent'?
answer:
britain's got talent


question:
What was the nationality of the painter Arthur Boyd?
answer:

arthur boyd