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


question:
The Bob Dylan songs 'Desolation Row', 'Tombstone Blues' and 'Like A Rolling Stone' featured on which album?
answer:
tombstone blues


question:
In which English city is the Cartwright Hall Art Gallery?
answer:

cartwright hall