Problem: London:

Greater London encompasses a total area of 1,583 square kilometres (611 sq mi), an area which had a population of 7,172,036 in 2001 and a population density of 4,542 inhabitants per square kilometre (11,760/sq mi). The extended area known as the London Metropolitan Region or the London Metropolitan Agglomeration, comprises a total area of 8,382 square kilometres (3,236 sq mi) has a population of 13,709,000 and a population density of 1,510 inhabitants per square kilometre (3,900/sq mi). Modern London stands on the Thames, its primary geographical feature, a navigable river which crosses the city from the south-west to the east. The Thames Valley is a floodplain surrounded by gently rolling hills including Parliament Hill, Addington Hills, and Primrose Hill. The Thames was once a much broader, shallower river with extensive marshlands; at high tide, its shores reached five times their present width.

In the past, how much wider was the River Thames than it is today?
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A: five times

Problem: The Institute also maintains a dozen regional offices around the United Kingdom, it opened its first regional office for the East of England at Cambridge in 1966.
When was RIBA's last satellite office opened?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
There is no cure for asthma. Symptoms can be prevented by avoiding triggers, such as allergens and irritants, and by the use of inhaled corticosteroids. Long-acting beta agonists (LABA) or antileukotriene agents may be used in addition to inhaled corticosteroids if asthma symptoms remain uncontrolled. Treatment of rapidly worsening symptoms is usually with an inhaled short-acting beta-2 agonist such as salbutamol and corticosteroids taken by mouth. In very severe cases, intravenous corticosteroids, magnesium sulfate, and hospitalization may be required.
How do you treat LABA if it gets worse?
A: unanswerable

Context and question: The Canadian constitution determines that the Commander-in-Chief of the Canadian Armed Forces is the country's sovereign, who, since 1904, has authorized his or her viceroy, the governor general, to exercise the duties ascribed to the post of Commander-in-Chief and to hold the associated title since 1905. All troop deployment and disposition orders, including declarations of war, fall within the royal prerogative and are issued as Orders in Council, which must be signed by either the monarch or governor general. Under the Westminster system's parliamentary customs and practices, however, the monarch and viceroy must generally follow the advice of his or her ministers in Cabinet, including the prime minister and minister of national defence, who are accountable to the elected House of Commons.
Who must sign these orders for them to be invalid?
Answer: unanswerable

Question: By 1989 Germany was nearing reunification and the Cold War was coming to a close. Army leadership reacted by starting to plan for a reduction in strength. By November 1989 Pentagon briefers were laying out plans to reduce army end strength by 23%, from 750,000 to 580,000. A number of incentives such as early retirement were used. In 1990 Iraq invaded its smaller neighbor, Kuwait, and U.S. land forces, quickly deployed to assure the protection of Saudi Arabia. In January 1991 Operation Desert Storm commenced, a U.S.-led coalition which deployed over 500,000 troops, the bulk of them from U.S. Army formations, to drive out Iraqi forces. The campaign ended in total victory, as Western coalition forces routed the Iraqi Army, organized along Soviet lines, in just one hundred hours.
Is there an answer to this question: In 1989, what did the Pentagon plan to reduce the army end strength to?

Answer: 580,000

By the Treaty of Paris (1763), France regained the five establishments captured by the British during the war (Pondichery, Mahe, Karikal, Yanam and Chandernagar) but was prevented from erecting fortifications and keeping troops in Bengal (art. XI). Elsewhere in India, the French were to remain a military threat, particularly during the War of American Independence, and up to the capture of Pondichery in 1793 at the outset of the French Revolutionary Wars without any military presence. Although these small outposts remained French possessions for the next two hundred years, French ambitions on Indian territories were effectively laid to rest, thus eliminating a major source of economic competition for the company.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): what year was the Treaty of Paris agreed on?
Ah, so..
1763