Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.

Ex Input:
The novels 'The Shipmaster, 'The Iron Ships' and 'The Trade Winds' by Cyril Abraham, are based on which 1970's British tv series?

Ex Output:
cyril abraham


Ex Input:
Which country is currently ruled by the Chakri dynasty that has been in power since 1782?

Ex Output:
chakri dynasty


Ex Input:
Which south coast town is served by the local radio station Arrow FM?

Ex Output:

arrow fm