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

[EX Q]: Brenda Mae Tarpley achieved fame under what name?
[EX A]: brenda mae tarpley

[EX Q]: Princess Estelle, Duchess of Ostergotland, granddaughter to King Carl XVI Gustaf, became 2nd in line to what nation's throne when born in 2012?
[EX A]: carl xvi gustaf of sweden

[EX Q]: Artists Gustav Klimt and Carl Moll were born in which European country?
[EX A]:
carl moll