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

[EX Q]: Which musical has the songs 'Another Suitcase In Another Hall' and 'Oh What A Circus'?
[EX A]: another suitcase in another hall

[EX Q]: Denzil Washington played which black militant leader in the 1992 film of the same name?
[EX A]: denzel washington

[EX Q]: Which London landmark was designed by Sir Christopher Wren to commemorate the Great Fire of London?
[EX A]:
christopher wren