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

Example Input: What is the Army equivalent to a Group Captain in the R.A.F.?
Example Output: british army

Example Input: Who was Prime Minister of Australia at the outbreak of World War I?
Example Output: australia

Example Input: In 1951, which European country saw the abdication of King Leopold lll in favour of his son Baudouin?
Example Output:
baudouin of belgium