instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
What was the currency of Austria before the Euro?
answer:
austria


question:
Which BBC current affairs programme, the longest-running in the world, is 60 years old this year ?
answer:
bbc


question:
Who plays Denis Thatcher in the 2011 film The Iron Lady?
answer:

denis thatcher