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

[Q]: Field Marshal Arthur Wellesley, shares his better known title with which Southern Hemisphere capital city?
[A]: arthur wellesley, 1st duke of wellington

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

[Q]: Name the pioneering Game Theory US mathematician featured in the film A Beautiful Mind?
[A]:
a beautiful mind