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

The Byzantine Empire is the term used since the 19th century to describe the Roman Empire of the Middle Ages, centred on its capital, where?
byzantine empire

In Curse of the Pink Panther who plays Clouseau after surgery?
curse of the pink panther

At which English castle in Northamptonshire was King Richard III born?

richard iii of england