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

washington dulles international airport
Which city is served by Dulles airport?

egg
What is the common name for the part of the chicken egg known as the albumen?

birthday cake

Who teamed up with Rihanna on the 2012 track Birthday Cake Chris Brown, Jay Sean, Nelly, Usher?