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:
The song Don't Rain On My Parade features in which musical?
answer:
don't rain on my parade


question:
Whose 2010 autobiography, is called Decision Points?
answer:

decision points