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

Who played boxer James Braddock in the 2005 biopic Cinderella Man?
james j. braddock

The headquarters building of which government agency is known as 'The Doughnut' due to its shape?
the doughnut

In the US, which state lies to the east of Arizona?
arizona