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

[EX Q]: What was the last silent film in which Chaplin's little tramp appeared?
[EX A]: chaplin

[EX Q]: The Bob Dylan songs 'Desolation Row', 'Tombstone Blues' and 'Like A Rolling Stone' featured on which album?
[EX A]: tombstone blues

[EX Q]: Which US government official is the equivalent of the British Foreign Secretary?
[EX A]:
secretary of state for foreign and commonwealth affairs