Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
On 6 September 2007, Belgian-based International Polar Foundation unveiled the Princess Elisabeth station, the world's first zero-emissions polar science station in Antarctica to research climate change. Costing $16.3 million, the prefabricated station, which is part of the International Polar Year, was shipped to the South Pole from Belgium by the end of 2008 to monitor the health of the polar regions. Belgian polar explorer Alain Hubert stated: "This base will be the first of its kind to produce zero emissions, making it a unique model of how energy should be used in the Antarctic." Johan Berte is the leader of the station design team and manager of the project which conducts research in climatology, glaciology and microbiology.
What was unveiled on 7 September 2006?
A: unanswerable

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As a child, Spielberg faced difficulty reconciling being an Orthodox Jew with the perception of him by other children he played with. "It isn't something I enjoy admitting," he once said, "but when I was seven, eight, nine years old, God forgive me, I was embarrassed because we were Orthodox Jews. I was embarrassed by the outward perception of my parents' Jewish practices. I was never really ashamed to be Jewish, but I was uneasy at times." Spielberg also said he suffered from acts of anti-Semitic prejudice and bullying: "In high school, I got smacked and kicked around. Two bloody noses. It was horrible."
At what age was Spielberg embarrassed by his family being Jewish?
A: seven, eight, nine years old

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Everything in between the far south and the far north is savannah (insignificant tree cover, with grasses and flowers located between trees). Rainfall is more limited, to between 500 and 1,500 millimetres (20 and 60 in) per year. The savannah zone's three categories are Guinean forest-savanna mosaic, Sudan savannah, and Sahel savannah. Guinean forest-savanna mosaic is plains of tall grass interrupted by trees. Sudan savannah is similar but with shorter grasses and shorter trees. Sahel savannah consists of patches of grass and sand, found in the northeast. In the Sahel region, rain is less than 500 millimetres (20 in) per year and the Sahara Desert is encroaching. In the dry north-east corner of the country lies Lake Chad, which Nigeria shares with Niger, Chad and Cameroon.
How many subregions are there of Nigeria's savannah zone?
A: three

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Computer science, built upon a foundation of theoretical linguistics, discrete mathematics, and electrical engineering, studies the nature and limits of computation. Subfields include computability, computational complexity, database design, computer networking, artificial intelligence, and the design of computer hardware. One area in which advances in computing have contributed to more general scientific development is by facilitating large-scale archiving of scientific data. Contemporary computer science typically distinguishes itself by emphasising mathematical 'theory' in contrast to the practical emphasis of software engineering.
What is the differing characteristic of contemporary computer science?
A:
emphasising mathematical 'theory'