Determine the topic of the question. Question: "what caused the world war 2?" Topic:
Ans: Causes of World War II

Determine the topic of the question. Question: "what countries allow gays to openly serve in the military?" Topic:
Ans: Sexual orientation and military service

Determine the topic of the question. Question: "what does Mazel tov! mean?" Topic:
Ans: Mazel tov

Determine the topic of the question. Question: "What is the purpose of North American Free Trade Agreement?" Topic:
Ans: North American Free Trade Agreement