Problem: Antarctica:

Some of Antarctica has been warming up; particularly strong warming has been noted on the Antarctic Peninsula. A study by Eric Steig published in 2009 noted for the first time that the continent-wide average surface temperature trend of Antarctica is slightly positive at >0.05 °C (0.09 °F) per decade from 1957 to 2006. This study also noted that West Antarctica has warmed by more than 0.1 °C (0.2 °F) per decade in the last 50 years, and this warming is strongest in winter and spring. This is partly offset by autumn cooling in East Antarctica. There is evidence from one study that Antarctica is warming as a result of human carbon dioxide emissions, but this remains ambiguous. The amount of surface warming in West Antarctica, while large, has not led to appreciable melting at the surface, and is not directly affecting the West Antarctic Ice Sheet's contribution to sea level. Instead the recent increases in glacier outflow are believed to be due to an inflow of warm water from the deep ocean, just off the continental shelf. The net contribution to sea level from the Antarctic Peninsula is more likely to be a direct result of the much greater atmospheric warming there.

Who published a 2007 study?
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A: unanswerable


Problem: In the past 20 years, several commercial streets have been developed, hence the nightlife has become more diverse: there are shopping malls opening late in the Xinjiekou CBD and Hunan Road. The well-established "Nanjing 1912" district hosts a wide variety of recreational facilities ranging from traditional restaurants and western pubs to dance clubs. There are two major areas where bars are densely located; one is in 1912 block; the other is along Shanghai road and its neighbourhood. Both are popular with international residents of the city.
Other than at "Nanjing 1912", where else are there a lot of bars?
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Answer: along Shanghai road and its neighbourhood


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Rajasthan attracted 14 percent of total foreign visitors during 2009–2010 which is the fourth highest among Indian states. It is fourth also in Domestic tourist visitors. Tourism is a flourishing industry in Rajasthan. The palaces of Jaipur and Ajmer-Pushkar, the lakes of Udaipur, the desert forts of Jodhpur, Taragarh Fort (Star Fort) in Ajmer, and Bikaner and Jaisalmer rank among the most preferred destinations in India for many tourists both Indian and foreign. Tourism accounts for eight percent of the state's domestic product. Many old and neglected palaces and forts have been converted into heritage hotels. Tourism has increased employment in the hospitality sector.
What two palaces are frequent tourist destinations within Rajasthan?
A: The palaces of Jaipur and Ajmer-Pushkar


Context and question: Beginning with its incorporation in 1802, Detroit has had a total of 74 mayors. Detroit's last mayor from the Republican Party was Louis Miriani, who served from 1957 to 1962. In 1973, the city elected its first black mayor, Coleman Young. Despite development efforts, his combative style during his five terms in office was not well received by many suburban residents. Mayor Dennis Archer, a former Michigan Supreme Court Justice, refocused the city's attention on redevelopment with a plan to permit three casinos downtown. By 2008, three major casino resort hotels established operations in the city.
Who was Detroit's first black mayor?
Answer: Coleman Young


Question: Beta testing comes after alpha testing and can be considered a form of external user acceptance testing. Versions of the software, known as beta versions, are released to a limited audience outside of the programming team known as beta testers. The software is released to groups of people so that further testing can ensure the product has few faults or bugs. Beta versions can be made available to the open public to increase the feedback field to a maximal number of future users and to deliver value earlier, for an extended or even indefinite period of time (perpetual beta).[citation needed]
Is there an answer to this question: Beta versions are released to a broad audience known as what?

Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The road to Yorktown and America's independence from Great Britain led through North Carolina. As the British Army moved north from victories in Charleston and Camden, South Carolina, the Southern Division of the Continental Army and local militia prepared to meet them. Following General Daniel Morgan's victory over the British Cavalry Commander Banastre Tarleton at the Battle of Cowpens on January 17, 1781, southern commander Nathanael Greene led British Lord Charles Cornwallis across the heartland of North Carolina, and away from the latter's base of supply in Charleston, South Carolina. This campaign is known as "The Race to the Dan" or "The Race for the River."
Who lost the battle of Cowpens?
A:
the British Cavalry