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

[Q]: 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?
[A]: byzantine empire

[Q]: According to folklore, what was the name of the monster slain by 'Beowulf'?
[A]: beowulf

[Q]: Who wrote a book called Dreams from my Father?
[A]:
dreams from my father