Problem: Antarctica:

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 unique characteristic does the Princess Elizabeth station feature?
---
A: zero-emissions

Problem: Maximilian was deeply dissatisfied with General Bazaine's decision to abandon the state capital of Chihuahua and immediately ordered Agustin B. Billaut to recapture the city. On December 11, 1865, Billaut with a force of 500 men took control of the city. By January 31, 1866 Billaut was ordered to leave Chihuahua, but he left behind 500 men to maintain control. At the zenith of their power, the imperialist forces controlled all but four states in Mexico; the only states to maintain strong opposition to the French were: Guerrero, Chihuahua, Sonora, and Baja California.
How many men did Billaut have when he recaptured the city?
---
Answer: 500

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Most Western languages (particularly those with writing systems based on the Latin, Cyrillic, Greek, Coptic, and Armenian alphabets) use letter cases in their written form as an aid to clarity. Scripts using two separate cases are also called bicameral scripts. Many other writing systems make no distinction between majuscules and minuscules a system called unicameral script or unicase. This includes most syllabic and other non-alphabetic scripts. The Georgian alphabet is special since it used to be bicameral, but today is mostly used in a unicameral way.
What do most Western languages use in their written form to add clarity?
A: letter cases

Context and question: Instead of being defined by "non" words, some organizations are suggesting new, positive-sounding terminology to describe the sector. The term "civil society organization" (CSO) has been used by a growing number of organizations, such as the Center for the Study of Global Governance. The term "citizen sector organization" (CSO) has also been advocated to describe the sector as one of citizens, for citizens by organizations such as Ashoka: Innovators for the Public. A more broadly applicable term, "Social Benefit Organization" (SBO) has been advocated for by organizations such as MiniDonations. Advocates argue that these terms describe the sector in its own terms, without relying on terminology used for the government or business sectors. However, use of terminology by a nonprofit of self-descriptive language that is not legally compliant risks confusing the public about nonprofit abilities, capabilities and limitations.
What is a term being used for organizations that are for the citizens, by the citizens?
Answer: citizen sector organization

Question: The terms asphalt and bitumen are often used interchangeably to mean both natural and manufactured forms of the substance. In American English, asphalt (or asphalt cement) is the carefully refined residue from the distillation process of selected crude oils. Outside the United States, the product is often called bitumen. Geologists often prefer the term bitumen. Common usage often refers to various forms of asphalt/bitumen as "tar", such as at the La Brea Tar Pits. Another archaic term for asphalt/bitumen is "pitch".
Is there an answer to this question: Where is bitumen the usual term for refined residue from crude oils?

Answer: United States

On the east side of the main park area is the National Museum of Visual Arts. On this side, a very popular street market takes place every Sunday. On the north side is an artificial lake with a little castle housing a municipal library for children. An area to its west is used as an open-air exhibition of photography. West of the park, across the coastal avenue Rambla Presidente Wilson, stretches Ramirez Beach. Directly west of the main park are, and belonging to Parque Rodo barrio, is the former Parque Hotel, now called Edificio Mercosur, seat of the parliament of the members countries of the Mercosur. During the guerilla war the Tupamaros frequently attacked buildings in this area, including the old hotel.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What takes part on the east side of the main park every Sunday?
Ah, so..
a very popular street market