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

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

[EX Q]: Which American film actress, born in 1947, had a 14 year relationship with Clint Eastwood, starring with him in several films before splitting up in 1989?
[EX A]: clint eastwood

[EX Q]: For what did Einstien gat Nobel prize in Physics?
[EX A]:
albert einstein