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

[Q]: What is the main river of Brazil?
[A]: brazil


[Q]: Which Dutchman managed both Newcastle and Chelsea in the 1990s?
[A]: chelsea f.c.


[Q]: Known as The Bay State, what was the 6th state to join the union on Feb 6, 1788?
[A]:
bay state