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

[EX Q]: What country has an official residence called Blair House, kept for guests of the leader of the country?
[EX A]: blair

[EX Q]: In March 1992 'Deeply Dippy' was the only number one hit for which group?
[EX A]: deeply dippy

[EX Q]: Which US crime drama TV series ran from 2008-2013 and starred Bryan Cranston in the leading role?
[EX A]:
bryan cranston