Problem: Sumer:

This period is generally taken to coincide with a major shift in population from southern Mesopotamia toward the north. Ecologically, the agricultural productivity of the Sumerian lands was being compromised as a result of rising salinity. Soil salinity in this region had been long recognized as a major problem. Poorly drained irrigated soils, in an arid climate with high levels of evaporation, led to the buildup of dissolved salts in the soil, eventually reducing agricultural yields severely. During the Akkadian and Ur III phases, there was a shift from the cultivation of wheat to the more salt-tolerant barley, but this was insufficient, and during the period from 2100 BC to 1700 BC, it is estimated that the population in this area declined by nearly three fifths. This greatly upset the balance of power within the region, weakening the areas where Sumerian was spoken, and comparatively strengthening those where Akkadian was the major language. Henceforth Sumerian would remain only a literary and liturgical language, similar to the position occupied by Latin in medieval Europe.

How much did the population of the region decline due to the decrease in crop productivity?
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A: by nearly three fifths

Problem: It was not unusual for electric recordings to be played back on acoustic phonographs. The Victor Orthophonic phonograph was a prime example where such playback was expected. In the Orthophonic, which benefited from telephone research, the mechanical pickup head was redesigned with lower resonance than the traditional mica type. Also, a folded horn with an exponential taper was constructed inside the cabinet to provide better impedance matching to the air. As a result, playback of an Orthophonic record sounded like it was coming from a radio.
What allowed better sounds inside the cabinet of the orthoponic phonograph?
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Answer: folded horn with an exponential taper

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In 1838 with the amount of smuggled opium entering China approaching 1,400 tons a year, the Chinese imposed a death penalty for opium smuggling and sent a Special Imperial Commissioner, Lin Zexu, to curb smuggling. This resulted in the First Opium War (183942). After the war Hong Kong island was ceded to Britain under the Treaty of Nanking and the Chinese market opened to the opium traders of Britain and other nations. The Jardines and Apcar and Company dominated the trade, although P&O also tried to take a share. A Second Opium War fought by Britain and France against China lasted from 1856 until 1860 and led to the Treaty of Tientsin, which legalised the importation of opium. Legalisation stimulated domestic Chinese opium production and increased the importation of opium from Turkey and Persia. This increased competition for the Chinese market led to India reducing its opium output and diversifying its exports.
Britian faught side by side with what country in the second Opium war?
A: France

Context and question: As the summit closed on 28 September 1970, hours after escorting the last Arab leader to leave, Nasser suffered a heart attack. He was immediately transported to his house, where his physicians tended to him. Nasser died several hours later, around 6:00 p.m. Heikal, Sadat, and Nasser's wife Tahia were at his deathbed. According to his doctor, al-Sawi Habibi, Nasser's likely cause of death was arteriosclerosis, varicose veins, and complications from long-standing diabetes. Nasser was a heavy smoker with a family history of heart diseasetwo of his brothers died in their fifties from the same condition. The state of Nasser's health was not known to the public prior to his death. He had previously suffered heart attacks in 1966 and September 1969.
When did Nasser die?
Answer: 28 September 1970

Question: Britain also sent troops to protect British business enterprise, harbour rights, and consulate office. This was followed by an eight-year civil war, during which each of the three powers supplied arms, training and in some cases combat troops to the warring Samoan parties. The Samoan crisis came to a critical juncture in March 1889 when all three colonial contenders sent warships into Apia harbour, and a larger-scale war seemed imminent. A massive storm on 15 March 1889 damaged or destroyed the warships, ending the military conflict.
Is there an answer to this question: On what date did the Samoans stand and fight for their own interests?

Answer: unanswerable

Problem: Green:

Thus, the languages mentioned above (Germanic, Romance, Slavic, Greek) have old terms for "green" which are derived from words for fresh, sprouting vegetation. However, comparative linguistics makes clear that these terms were coined independently, over the past few millennia, and there is no identifiable single Proto-Indo-European or word for "green". For example, the Slavic zelen is cognate with Sanskrit hari "yellow, ochre, golden". The Turkic languages also have jasl "green" or "yellowish green", compared to a Mongolian word for "meadow".

How were the terms for "green" derived in the Germanic, Romance, Slavic, and Greek languages?
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A:
independently