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

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

Ex Output:
droid


Ex Input:
Who is the BBC's political editor?

Ex Output:
bbc


Ex Input:
Who replaced Mickey Arthur as coach of the Australian cricket team in June?

Ex Output:

australia national cricket team