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

[Q]: Which poem by Keats and novel by Disraeli both have the same title?
[A]: john keats


[Q]: Chris Martin is the lead vocalist and rhythm guitarist with which group?
[A]: chris martin


[Q]: Who was the father of John of Gaunt and Edward, the Black Prince?
[A]:
edward, the black prince