Determine the topic of the question-answer pair. Question: "what caused the world war 2?"; Answer: "The culmination of events that led to the outbreak of war are generally understood to be the 1939 invasion of Poland by Germany and Soviet Russia and the 1937 invasion of the Republic of China by the Empire of Japan ."? Topic:
Ans: Causes of World War II

Determine the topic of the question-answer pair. Question: "what countries allow gays to openly serve in the military?"; Answer: "Nations that permit gay people to serve openly in the military include the 4 of the 5 members of the UN Security Council (United States, United Kingdom, France, and Russia), the Republic of China (Taiwan), Australia , Israel , South Africa , Argentina , and all NATO members excluding Turkey ."? Topic:
Ans: Sexual orientation and military service

Determine the topic of the question-answer pair. Question: "what does Mazel tov! mean?"; Answer: ""good luck") is a phrase used to express congratulations for a happy and significant occasion or event."? Topic:
Ans: Mazel tov

Determine the topic of the question-answer pair. Question: "What is the purpose of North American Free Trade Agreement?"; Answer: "The North American Free Trade Agreement (NAFTA) is an agreement signed by Canada , Mexico , and the United States , creating a trilateral trade bloc in North America ."? Topic:
Ans: North American Free Trade Agreement