Problem: Antarctica:

The Protocol on Environmental Protection to the Antarctic Treaty (also known as the Environmental Protocol or Madrid Protocol) came into force in 1998, and is the main instrument concerned with conservation and management of biodiversity in Antarctica. The Antarctic Treaty Consultative Meeting is advised on environmental and conservation issues in Antarctica by the Committee for Environmental Protection. A major concern within this committee is the risk to Antarctica from unintentional introduction of non-native species from outside the region.

What came into force in 1988?
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A: unanswerable


Problem: Roughly one quarter of all zinc output in the United States (2009), is consumed in the form of zinc compounds; a variety of which are used industrially. Zinc oxide is widely used as a white pigment in paints, and as a catalyst in the manufacture of rubber. It is also used as a heat disperser for the rubber and acts to protect its polymers from ultraviolet radiation (the same UV protection is conferred to plastics containing zinc oxide). The semiconductor properties of zinc oxide make it useful in varistors and photocopying products. The zinc zinc-oxide cycle is a two step thermochemical process based on zinc and zinc oxide for hydrogen production.
Why is zinc oxide unhelpful in photocopying products?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In an effort to demonstrate peaceful intentions toward Germany, on 13 April 1941, the Soviets signed a neutrality pact with Axis power Japan. While Stalin had little faith in Japan's commitment to neutrality, he felt that the pact was important for its political symbolism, to reinforce a public affection for Germany. Stalin felt that there was a growing split in German circles about whether Germany should initiate a war with the Soviet Union. Stalin did not know that Hitler had been secretly discussing an invasion of the Soviet Union since summer 1940, and that Hitler had ordered his military in late 1940 to prepare for war in the east regardless of the parties' talks of a potential Soviet entry as a fourth Axis Power.
Who did the Soviet Union agree to remain neutral with when they rejected a treaty on the 13th of April?
A: unanswerable


Context and question: Napoleon institutionalised plunder of conquered territories: French museums contain art stolen by Napoleon's forces from across Europe. Artefacts were brought to the Musée du Louvre for a grand central museum; his example would later serve as inspiration for more notorious imitators. He was compared to Adolf Hitler most famously by the historian Pieter Geyl in 1947 and Claude Ribbe in 2005. David G. Chandler, a foremost historian of Napoleonic warfare, wrote in 1973 that, "Nothing could be more degrading to the former [Napoleon] and more flattering to the latter [Hitler]. The comparison is odious. On the whole Napoleon was inspired by a noble dream, wholly dissimilar from Hitler's... Napoleon left great and lasting testimonies to his genius—in codes of law and national identities which survive to the present day. Adolf Hitler left nothing but destruction."
Where in France were plundered artifacts brought in an effort to create a great central museum?
Answer: the Musée du Louvre


Question: Washington University supports four major student-run media outlets. The university's student newspaper, Student Life, is available for students. KWUR (90.3 FM) serves as the students' official radio station; the station also attracts an audience in the immediately surrounding community due to its eclectic and free-form musical programming. WUTV is the university's closed-circuit television channel. The university's main student-run political publication is the Washington University Political Review (nicknamed "WUPR"), a self-described "multipartisan" monthly magazine. Washington University undergraduates publish two literary and art journals, The Eliot Review and Spires Intercollegiate Arts and Literary Magazine. A variety of other publications also serve the university community, ranging from in-house academic journals to glossy alumni magazines to WUnderground, campus' student-run satirical newspaper.
Is there an answer to this question: How many student-run political publications are there at Washington University?

Answer: unanswerable


Question: Karl Popper's rejection of Marxism during his teenage years left a profound mark on his thought. He had at one point joined a socialist association, and for a few months in 1919 considered himself a communist. During this time he became familiar with the Marxist view of economics, class-war, and history. Although he quickly became disillusioned with the views expounded by Marxism, his flirtation with the ideology led him to distance himself from those who believed that spilling blood for the sake of a revolution was necessary. He came to realise that when it came to sacrificing human lives, one was to think and act with extreme prudence.
Is there an answer to this question: When did Popper think it was unnecessary to act with prudence? 

Answer:
unanswerable