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

[Q]: Which evolutionary biologist wrote The Ancestor's Tale in 2004?
[A]: the ancestor's tale


[Q]: In which country are the Angel Falls, or Kerepakupai Ven?
[A]: angel falls


[Q]: Who was married to both Joe Dimaggio and Arthur Miller?
[A]:
arthur miller