Problem: Modern history:

On December 7, 1941, Japan attacked the United States at Pearl Harbor, bringing it too into the war on the Allied side. China also joined the Allies, as eventually did most of the rest of the world. China was in turmoil at the time, and attacked Japanese armies through guerilla-type warfare. By the beginning of 1942, the major combatants were aligned as follows: the British Commonwealth, the United States, and the Soviet Union were fighting Germany and Italy; and the British Commonwealth, China, and the United States were fighting Japan. The United Kingdom, the United States, the Soviet Union and China were referred as a "trusteeship of the powerful" during the World War II  and were recognized as the Allied "Big Four" in Declaration by United Nations These four countries were considered as the "Four Policemen" or "Four Sheriffs" of the Allies power and primary victors of World War II. From then through August 1945, battles raged across all of Europe, in the North Atlantic Ocean, across North Africa, throughout Southeast Asia, throughout China, across the Pacific Ocean and in the air over Japan.

When did the attack on Pearl Harbor occur?
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A: December 7, 1941


Problem: Thermographic cameras detect radiation in the infrared range of the electromagnetic spectrum (roughly 900–14,000 nanometers or 0.9–14 μm) and produce images of that radiation. Since infrared radiation is emitted by all objects based on their temperatures, according to the black body radiation law, thermography makes it possible to "see" one's environment with or without visible illumination. The amount of radiation emitted by an object increases with temperature, therefore thermography allows one to see variations in temperature (hence the name).
What law states that infrared radiation is emitted by objects based on temperature?
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Answer: the black body radiation law


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
However, early farmers were also adversely affected in times of famine, such as may be caused by drought or pests. In instances where agriculture had become the predominant way of life, the sensitivity to these shortages could be particularly acute, affecting agrarian populations to an extent that otherwise may not have been routinely experienced by prior hunter-gatherer communities. Nevertheless, agrarian communities generally proved successful, and their growth and the expansion of territory under cultivation continued.
What type of societies were not affected by famine?
A: hunter-gatherer communities


Context and question: The noise-based speed is defined as the exposure that will lead to a given signal-to-noise ratio on individual pixels. Two ratios are used, the 40:1 ("excellent image quality") and the 10:1 ("acceptable image quality") ratio. These ratios have been subjectively determined based on a resolution of 70 pixels per cm (178 DPI) when viewed at 25 cm (9.8 inch) distance. The signal-to-noise ratio is defined as the standard deviation of a weighted average of the luminance and color of individual pixels. The noise-based speed is mostly determined by the properties of the sensor and somewhat affected by the noise in the electronic gain and AD converter.
What is the noise-based speed?
Answer: the exposure that will lead to a given signal-to-noise ratio on individual pixels


Question: Education is compulsory from the age of 7 to 13. The enrollment of boys is higher than that of girls. In 1998, the gross primary enrollment rate was 53.5%, with higher enrollment ratio for males (67.7%) compared to females (40%).
Is there an answer to this question: What are the ages when education is compulsory?

Answer: 7 to 13


Problem: Montana:

However, at the state level, the pattern of split ticket voting and divided government holds. Democrats currently hold one of the state's U.S. Senate seats, as well as four of the five statewide offices (Governor, Superintendent of Public Instruction, Secretary of State and State Auditor). The lone congressional district has been Republican since 1996 and in 2014 Steve Daines won one of the state's Senate seats for the GOP. The Legislative branch had split party control between the house and senate most years between 2004 and 2010, when the mid-term elections returned both branches to Republican control. The state Senate is, as of 2015, controlled by the Republicans 29 to 21, and the State House of Representatives at 59 to 41.

How many seats do Democrats hold in the state US Senate's seats?
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A:
one