Problem: Republic of the Congo:

The region was dominated by Bantu-speaking tribes, who built trade links leading into the Congo River basin. Congo-Brazzaville was formerly part of the French colony of Equatorial Africa. Upon independence in 1960, the former colony of French Congo became the Republic of the Congo. The People's Republic of the Congo was a MarxistLeninist one-party state from 1970 to 1991. Multi-party elections have been held since 1992, although a democratically elected government was ousted in the 1997 Republic of the Congo Civil War and President Denis Sassou Nguesso has ruled for 26 of the past 36 years.

What year was President Denis Sassou Nguesso ousted?
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A: unanswerable

Problem: In 1947, the King and his family toured Southern Africa. The Prime Minister of the Union of South Africa, Jan Smuts, was facing an election and hoped to make political capital out of the visit. George was appalled, however, when instructed by the South African government to shake hands only with whites, and referred to his South African bodyguards as "the Gestapo". Despite the tour, Smuts lost the election the following year, and the new government instituted a strict policy of racial segregation.
In what year did Jan Smuts become Prime Minister?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
On August 31, 2009, The Walt Disney Company announced a deal to acquire Marvel Comics' parent corporation, Marvel Entertainment, for $4 billion or $4.2 billion, with Marvel shareholders to receive $30 and 0.745 Disney shares for each share of Marvel they own. As of 2008, Marvel and its major, longtime competitor DC Comics shared over 80% of the American comic-book market. As of September 2010, Marvel switched its bookstores distribution company from Diamond Book Distributors to Hachette Distribution Services.
What did Marvel Entertainment purchase in 2009?
A: unanswerable

Context and question: Schwarzenegger signed another executive order on October 17, 2006 allowing California to work with the Northeast's Regional Greenhouse Gas Initiative. They plan to reduce carbon dioxide emissions by issuing a limited amount of carbon credits to each power plant in participating states. Any power plants that exceed emissions for the amount of carbon credits will have to purchase more credits to cover the difference. The plan took effect in 2009. In addition to using his political power to fight global warming, the governor has taken steps at his home to reduce his personal carbon footprint. Schwarzenegger has adapted one of his Hummers to run on hydrogen and another to run on biofuels. He has also installed solar panels to heat his home.
What year did the Greenhouse Gas Initiative go into effect?
Answer: 2009

Question: A combined UN civilian and peace-keeping force called UNTAG (United Nations Transition Assistance Group) under Finnish diplomat Martti Ahtisaari was deployed from April 1989 to March 1990 to monitor the peace process, elections and supervise military withdrawals. As UNTAG began to deploy peacekeepers, military observers, police, and political workers, hostilities were briefly renewed on the day the transition process was supposed to begin. After a new round of negotiations, a second date was set and the elections process began in earnest. After the return of SWAPO exiles (over 46,000 exiles), Namibia's first one-person one-vote elections for the constitutional assembly took place in November 1989. The official election slogan was "Free and Fair Elections". This was won by SWAPO although it did not gain the two-thirds majority it had hoped for; the South African-backed Democratic Turnhalle Alliance (DTA) became the official opposition. The elections were peaceful and declared free and fair.
Is there an answer to this question: In what year did Martti Ahtisaarsi become a diplomat?

Answer: unanswerable

Question: Mexico City offers an immense and varied consumer retail market, ranging from basic foods to ultra high-end luxury goods. Consumers may buy in fixed indoor markets, mobile markets (tianguis), from street vendors, from downtown shops in a street dedicated to a certain type of good, in convenience stores and traditional neighborhood stores, in modern supermarkets, in warehouse and membership stores and the shopping centers that they anchor, in department stores, big-box stores and in modern shopping malls.
Is there an answer to this question: How is the retail market of Mexico City?

Answer:
immense and varied