instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Which engineer built the Menai Suspension Bridge and the Caledonian Canal?
answer:
menai suspension bridge


question:
Who painted The Card Players, at Feb 2012 the most expensive artwork in the world?
answer:
the card players


question:
Where are the British Houses of Parliament?
answer:

palace of westminster