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

Ex Input:
Against which country did Britain fight 'The Cod Wars'?

Ex Output:
cod wars

Ex Input:
In May 1940, who became British Prime Minister after the resignation of Neville Chamberlain?

Ex Output:
prime minister of the united kingdom

Ex Input:
Who won the 1962 Nobel Prize for Medicine for their discovery of the structure of DNA along with James Watson and Maurice Wilkins?

Ex Output:
dna