Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
One example is below.
Q: Who was the first American President?
A: president of the united states
Rationale: The question talks about the president of the USA.
Q: Which co-presenter of a programme for car enthusiasts has also presented Braniac: Science Abuse, The Gunpowder Plot: Exploding the Legend, Blast Lab and Invisible Worlds?
A:
brainiac: science abuse