Problem: Genocide:

The Convention came into force as international law on 12 January 1951 after the minimum 20 countries became parties. At that time however, only two of the five permanent members of the UN Security Council were parties to the treaty: France and the Republic of China. The Soviet Union ratified in 1954, the United Kingdom in 1970, the People's Republic of China in 1983 (having replaced the Taiwan-based Republic of China on the UNSC in 1971), and the United States in 1988. This long delay in support for the Convention by the world's most powerful nations caused the Convention to languish for over four decades. Only in the 1990s did the international law on the crime of genocide begin to be enforced.

How many of the five permanent member s of China were parties to the treaty?
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A: unanswerable


Problem: Slavs:

The word "Slavs" was used in the national anthem of the Slovak Republic (1939–1945), Yugoslavia (1943–1992) and the Federal Republic of Yugoslavia (1992–2003), later Serbia and Montenegro (2003–2006).

When was the word "Slavs" used in the national anthem of the Slovak Republic?
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A: 1939–1945


Problem: United States Air Force:

Many of the U.S. Air Force's formal and informal traditions are an amalgamation of those taken from the Royal Air Force (e.g., dining-ins/mess nights) or the experiences of its predecessor organizations such as the U.S. Army Air Service, U.S. Army Air Corps and the U.S. Army Air Forces. Some of these traditions range from "Friday Name Tags" in flying units to an annual "Mustache Month." The use of "challenge coins" is a recent innovation that was adopted from the U.S. Army while another cultural tradition unique to the Air Force is the "roof stomp", practiced by Air Force members to welcome a new commander or to commemorate another event, such as a retirement.

What does the roof stomp tradition signify in the US Air Force?
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A: welcome a new commander or to commemorate another event, such as a retirement


Problem: Beyoncé:

Beyoncé embarked on The Mrs. Carter Show World Tour on April 15 in Belgrade, Serbia; the tour included 132 dates that ran through to March 2014. It became the most successful tour of her career and one of the most-successful tours of all time. In May, Beyoncé's cover of Amy Winehouse's "Back to Black" with André 3000 on The Great Gatsby soundtrack was released. She was also honorary chair of the 2013 Met Gala. Beyoncé voiced Queen Tara in the 3D CGI animated film, Epic, released by 20th Century Fox on May 24, and recorded an original song for the film, "Rise Up", co-written with Sia.

When did the tour begin?
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A:
April 15