instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
Which Dutchman managed both Newcastle and Chelsea in the 1990s?
answer:
chelsea f.c.

question:
In which famous film did Michael Caine play a character named Charlie Croker?
answer:
charlie croker

question:
The detonation of the first atomic bomb, Trinity, ushered in the Atomic Age, when the bomb was tested outside of Alamogordo in what US state on July 16, 1945?
answer:
alamogordo, new mexico