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

[Q]: Released last month, People, Hell and Angels is a posthumous album made up of songs recorded by which artist in 1969 ?
[A]: angel


[Q]: The film Schindler's List was based on whose Booker Prize winning novel of 1982?
[A]: schindler's list


[Q]: The American television series 'Angel' was a spin-off of which other hugely popular show?
[A]:
angel