Problem: Westminster Abbey:

The abbot and monks, in proximity to the royal Palace of Westminster, the seat of government from the later 12th century, became a powerful force in the centuries after the Norman Conquest. The abbot often was employed on royal service and in due course took his place in the House of Lords as of right. Released from the burdens of spiritual leadership, which passed to the reformed Cluniac movement after the mid-10th century, and occupied with the administration of great landed properties, some of which lay far from Westminster, "the Benedictines achieved a remarkable degree of identification with the secular life of their times, and particularly with upper-class life", Barbara Harvey concludes, to the extent that her depiction of daily life provides a wider view of the concerns of the English gentry in the High and Late Middle Ages.[citation needed]

Who became a powerful force after the Norman Conquest?
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A: The abbot and monks


Problem: The bacillus causing tuberculosis, M. tuberculosis, was identified and described on 24 March 1882 by Robert Koch. He received the Nobel Prize in physiology or medicine in 1905 for this discovery. Koch did not believe the bovine (cattle) and human tuberculosis diseases were similar, which delayed the recognition of infected milk as a source of infection. Later, the risk of transmission from this source was dramatically reduced by the invention of the pasteurization process. Koch announced a glycerine extract of the tubercle bacilli as a "remedy" for tuberculosis in 1890, calling it "tuberculin". While it was not effective, it was later successfully adapted as a screening test for the presence of pre-symptomatic tuberculosis. The World Tuberculosis Day was established on 24 March for this reason.
Who discovered M. tuberculosis?
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Answer: Robert Koch


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The Information Office of the State Council of the PRC preserves an edict of the Zhengtong Emperor (r. 1435–1449) addressed to the Karmapa in 1445, written after the latter's agent had brought holy relics to the Ming court. Zhengtong had the following message delivered to the Great Treasure Prince of Dharma, the Karmapa:
What years did the Zhengtong Emperor reign?
A: 1435–1449


Context and question: As a result of continued warming, the polar ice caps melted and much of Gondwana became a desert. In Eastern Antarctica, seed ferns or pteridosperms became abundant and large amounts of sandstone and shale were laid down at this time. Synapsids, commonly known as "mammal-like reptiles", were common in Antarctica during the Early Triassic and included forms such as Lystrosaurus. The Antarctic Peninsula began to form during the Jurassic period (206–146 Ma), and islands gradually rose out of the ocean. Ginkgo trees, conifers, bennettites, horsetails, ferns and cycads were plentiful during this period. In West Antarctica, coniferous forests dominated through the entire Cretaceous period (146–66 Ma), though southern beech became more prominent towards the end of this period. Ammonites were common in the seas around Antarctica, and dinosaurs were also present, though only three Antarctic dinosaur genera (Cryolophosaurus and Glacialisaurus, from the Hanson Formation, and Antarctopelta) have been described to date. It was during this era that Gondwana began to break up.
What did most of Gondwana become when the polar ice melted?
Answer: desert


Question: LED lamps have been advocated as the newest and best environmental lighting method. According to the Energy Saving Trust, LED lamps use only 10% power compared to a standard incandescent bulb, where compact fluorescent lamps use 20% and energy saving halogen lamps 70%. The lifetime is also much longer — up to 50,000 hours. A downside is still the initial cost, which is higher than that of compact fluorescent lamps.
Is there an answer to this question: What is the average lifetime of a CFL?

Answer: 50,000 hours


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
In December 2011, the system went into operation on a trial basis. It has started providing navigation, positioning and timing data to China and the neighbouring area for free from 27 December. During this trial run, Compass will offer positioning accuracy to within 25 meters, but the precision will improve as more satellites are launched. Upon the system's official launch, it pledged to offer general users positioning information accurate to the nearest 10 m, measure speeds within 0.2 m per second, and provide signals for clock synchronisation accurate to 0.02 microseconds.
After official launch, the system declined to offer customers positioning information accurate to the nearest what?
A:
unanswerable