Problem: Geological history of Earth:

The Devonian spanned roughly from 419 to 359 Ma. The period was a time of great tectonic activity, as Laurasia and Gondwana drew closer together. The continent Euramerica (or Laurussia) was created in the early Devonian by the collision of Laurentia and Baltica, which rotated into the natural dry zone along the Tropic of Capricorn. In these near-deserts, the Old Red Sandstone sedimentary beds formed, made red by the oxidized iron (hematite) characteristic of drought conditions. Near the equator Pangaea began to consolidate from the plates containing North America and Europe, further raising the northern Appalachian Mountains and forming the Caledonian Mountains in Great Britain and Scandinavia. The southern continents remained tied together in the supercontinent of Gondwana. The remainder of modern Eurasia lay in the Northern Hemisphere. Sea levels were high worldwide, and much of the land lay submerged under shallow seas. The deep, enormous Panthalassa (the "universal ocean") covered the rest of the planet. Other minor oceans were Paleo-Tethys, Proto-Tethys, Rheic Ocean and Ural Ocean (which was closed during the collision with Siberia and Baltica).

What type od seimentary beds formed in the desert along the Tropic of Capricorn?
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A: unanswerable

Problem: As the European population was severely reduced, land became more plentiful for the survivors, and labour consequently more expensive. Attempts by landowners to forcibly reduce wages, such as the English 1351 Statute of Laborers, were doomed to fail. These efforts resulted in nothing more than fostering resentment among the peasantry, leading to rebellions such as the French Jacquerie in 1358 and the English Peasants' Revolt in 1381. The long-term effect was the virtual end of serfdom in Western Europe. In Eastern Europe, on the other hand, landowners were able to exploit the situation to force the peasantry into even more repressive bondage.
When didn't the French Jacquerie take place?
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Answer: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Many insects are considered pests by humans. Insects commonly regarded as pests include those that are parasitic (e.g. lice, bed bugs), transmit diseases (mosquitoes, flies), damage structures (termites), or destroy agricultural goods (locusts, weevils). Many entomologists are involved in various forms of pest control, as in research for companies to produce insecticides, but increasingly rely on methods of biological pest control, or biocontrol. Biocontrol uses one organism to reduce the population density of another organism the pest and is considered a key element of integrated pest management.
What kind of insect can damage architectural structures?
A: termites

Context and question: On 1 February 1908, the king Dom Carlos I of Portugal and his heir apparent, Prince Royal Dom Luis Filipe, Duke of Braganza, were murdered in Lisbon. Under his rule, Portugal had twice been declared bankrupt on 14 June 1892, and again on 10 May 1902 causing social turmoil, economic disturbances, protests, revolts and criticism of the monarchy. Manuel II of Portugal became the new king, but was eventually overthrown by the 5 October 1910 revolution, which abolished the regime and instated republicanism in Portugal. Political instability and economic weaknesses were fertile ground for chaos and unrest during the Portuguese First Republic. These conditions would lead to the failed Monarchy of the North, 28 May 1926 coup d'etat, and the creation of the National Dictatorship (Ditadura Nacional).
During the Portuguese First Republic, what creating a fertile ground for chaos and unrest?
Answer: Political instability and economic weaknesses

Question: The competition formed as the FA Premier League on 20 February 1992 following the decision of clubs in the Football League First Division to break away from the Football League, which was originally founded in 1888, and take advantage of a lucrative television rights deal. The deal was worth 1 billion a year domestically as of 201314, with BSkyB and BT Group securing the domestic rights to broadcast 116 and 38 games respectively. The league generates 2.2 billion per year in domestic and international television rights. In 2014/15, teams were apportioned revenues of 1.6 billion.
Is there an answer to this question: Which club did the Football League decide to break away from?

Answer: unanswerable

Problem: Gramophone record:

The playing time of a phonograph record depended on the turntable speed and the groove spacing. At the beginning of the 20th century, the early discs played for two minutes, the same as early cylinder records. The 12-inch disc, introduced by Victor in 1903, increased the playing time to three and a half minutes. Because a 10-inch 78 rpm record could hold about three minutes of sound per side and the 10-inch size was the standard size for popular music, almost all popular recordings were limited to around three minutes in length. For example, when King Oliver's Creole Jazz Band, including Louis Armstrong on his first recordings, recorded 13 sides at Gennett Records in Richmond, Indiana, in 1923, one side was 2:09 and four sides were 2:522:59.

What factors would effect playing time of a phonograph?
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A:
turntable speed and the groove spacing