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

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

Cassandra, Grizabella and Skimbleshanks are all characters in which Andrew Lloyd Webber musical?
andrew lloyd webber

Who directed the films `Faster, Pussycat! Kill! Kill!` and `Beyond The Valley Of The Dolls`?

faster, pussycat! kill! kill!