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

Input: Consider Input: In which war was the Battle of Bunker Hill?

Output: battle of bunker hill

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

Output: baudouin of belgium

Input: Consider Input: Christopher Walken won the best supporting actor Oscar in 1979 for his role in which film?
Output: christopher walken