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

Who is the BBC's political editor?
bbc

Who married the woman who was to become Queen Beatrix of the Netherlands, on 10 March 1966?
beatrix

What is the name of the astromech droid companion of Anakin Skywalker, Luke Skywalker and Obi-Wan Kenobi in the Star Wars franchise?

droid