instruction:
Given a factoid/trivia type question, generate the topic of the question. The topic is the entity the question talks about.
question:
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?
answer:
byzantine empire


question:
Which sprinter lit the Olympic flame at the 2000 Summer Olympic Games in Australia?
answer:
2000 summer olympics


question:
Who played Blott, in BBC's 1985 adaptation of Tom Sharpe's novel 'Blott on the Landscape'?
answer:

blott on the landscape