Problem: Film speed:

The Scheinergrade (Sch.) system was devised by the German astronomer Julius Scheiner (1858–1913) in 1894 originally as a method of comparing the speeds of plates used for astronomical photography. Scheiner's system rated the speed of a plate by the least exposure to produce a visible darkening upon development. Speed was expressed in degrees Scheiner, originally ranging from 1° Sch. to 20° Sch., where an increment of 19° Sch. corresponded to a hundredfold increase in sensitivity, which meant that an increment of 3° Sch. came close to a doubling of sensitivity.

Who created the Scheinergrade system? 
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A: the German astronomer Julius Scheiner


Problem: Highbury could hold more than 60,000 spectators at its peak, and had a capacity of 57,000 until the early 1990s. The Taylor Report and Premier League regulations obliged Arsenal to convert Highbury to an all-seater stadium in time for the 1993–94 season, thus reducing the capacity to 38,419 seated spectators. This capacity had to be reduced further during Champions League matches to accommodate additional advertising boards, so much so that for two seasons, from 1998 to 2000, Arsenal played Champions League home matches at Wembley, which could house more than 70,000 spectators.
What seating capacity did Wembley offer that have to lure Arsenal to play there?
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Answer: 70,000


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The liberal political forces maintained strong control over the state government until shortly after the French Intervention which turned the tables in favor to the conservative forces once again. The intervention had serious repercussions for the state of Chihuahua. President Juárez, in an effort to organize a strong defense against the French, decreed a list of national guard units that every state had to contribute to the Ministry of War and the Navy; Chihuahua was responsible for inducting 2,000 men. Regaining power, Governor Luis Terrazas assigned the First Battalion of Chihuahua for integration into the national army led by General Jesús González Ortega; the battalion was deployed to Puebla. After the defeat of the army in Puebla, the Juárez administration was forced to abandon Mexico City; the president retreated further north seeking refuge in the state of Chihuahua.
Who assigned the First Battalion of Chihuahua for integration into the army?
A: Governor Luis Terrazas


Context and question: Freemasonry, as it exists in various forms all over the world, has a membership estimated by the United Grand Lodge of England at around six million worldwide. The fraternity is administratively organised into independent Grand Lodges (or sometimes Grand Orients), each of which governs its own Masonic jurisdiction, which consists of subordinate (or constituent) Lodges. The largest single jurisdiction, in terms of membership, is the United Grand Lodge of England (with a membership estimated at around a quarter million). The Grand Lodge of Scotland and Grand Lodge of Ireland (taken together) have approximately 150,000 members. In the United States total membership is just under two million.
How many members left the United States?
Answer: unanswerable


Question: The committee debated the possibility of a shift function (like in ITA2), which would allow more than 64 codes to be represented by a six-bit code. In a shifted code, some character codes determine choices between options for the following character codes. It allows compact encoding, but is less reliable for data transmission as an error in transmitting the shift code typically makes a long part of the transmission unreadable. The standards committee decided against shifting, and so ASCII required at least a seven-bit code.:215, 236 § 4
Is there an answer to this question: Why did the committee debate adding a character code function?

Answer: unanswerable


Problem: Tucson, Arizona:

By 1900, 7,531 people lived in the city. The population increased gradually to 13,913 in 1910. At about this time, the U.S. Veterans Administration had begun construction on the present Veterans Hospital. Many veterans who had been gassed in World War I and were in need of respiratory therapy began coming to Tucson after the war, due to the clean dry air. Over the following years the city continued to grow, with the population increasing to 20,292 in 1920 and 36,818 in 1940. In 2006 the population of Pima County, in which Tucson is located, passed one million while the City of Tucson's population was 535,000.

What did the U.S. Veterans Administration build around 1910?
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A:
Veterans Hospital