TASK DEFINITION: Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
PROBLEM: Ashgabat is the capital of which country, a former Soviet republic in Asia?

SOLUTION: ashgabat

PROBLEM: In book and film, which vessel was commanded by Charlie Allnut?

SOLUTION: charlie allnut

PROBLEM: Which is the oldest regiment of the regular British Army?

SOLUTION:
british army