Given an open-ended topic (movie name, a persons name, an event, sports, etc) generate a simple trivia-type question.

antofagasta
The area with the world's lowest rainfall (less than 0.2mm per year is the Antofagasta region, of which country?

gulf of bothnia
What sea contains the gulfs of Finland and Bothnia?

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