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

[Q]: What is the largest city in Bavaria?
[A]: bavaria


[Q]: In 1951, which European country saw the abdication of King Leopold lll in favour of his son Baudouin?
[A]: baudouin of belgium


[Q]: Which English actor played the title role in the 19768 family film Blackbeard's Ghost?
[A]:
blackbeard's ghost