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

Input: Consider Input: 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?

Output: byzantine empire

Input: Consider Input: The song Don't Rain On My Parade features in which musical?

Output: don't rain on my parade

Input: Consider Input: Who am I, I was born in 1936 in Czechoslovakia, was a playwright and became a politician being the last President of Czechoslovakia (1989-92) and the first President of the Czech Republic (1993-2003)?
Output: president of the czech republic