Problem: Hydrogen:

Hydrogen was liquefied for the first time by James Dewar in 1898 by using regenerative cooling and his invention, the vacuum flask. He produced solid hydrogen the next year. Deuterium was discovered in December 1931 by Harold Urey, and tritium was prepared in 1934 by Ernest Rutherford, Mark Oliphant, and Paul Harteck. Heavy water, which consists of deuterium in the place of regular hydrogen, was discovered by Urey's group in 1932. François Isaac de Rivaz built the first de Rivaz engine, an internal combustion engine powered by a mixture of hydrogen and oxygen in 1806. Edward Daniel Clarke invented the hydrogen gas blowpipe in 1819. The Döbereiner's lamp and limelight were invented in 1823.

What year was tritium discovered?
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A: 1934


Problem: In other cities, class conflict was more evident. Over a quarter of London's population had left the city by November 1940. Civilians left for more remote areas of the country. Upsurges in population south Wales and Gloucester intimated where these displaced people went. Other reasons, including industry dispersal may have been a factor. However, resentment of rich self-evacuees or hostile treatment of poor ones were signs of persistence of class resentments although these factors did not appear to threaten social order. The total number of evacuees numbered 1.4 million, including a high proportion from the poorest inner-city families. Reception committees were completely unprepared for the condition of some of the children. Far from displaying the nation's unity in time of war, the scheme backfired, often aggravating class antagonism and bolstering prejudice about the urban poor. Within four months, 88% of evacuated mothers, 86% of small children, and 43% of school children had been returned home. The lack of bombing in the Phoney War contributed significantly to the return of people to the cities, but class conflict was not eased a year later when evacuation operations had to be put into effect again.
What locations saw an increase in populations?
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Answer: south Wales and Gloucester


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Also referred to as the Panhandle or Inside Passage, this is the region of Alaska closest to the rest of the United States. As such, this was where most of the initial non-indigenous settlement occurred in the years following the Alaska Purchase. The region is dominated by the Alexander Archipelago as well as the Tongass National Forest, the largest national forest in the United States. It contains the state capital Juneau, the former capital Sitka, and Ketchikan, at one time Alaska's largest city. The Alaska Marine Highway provides a vital surface transportation link throughout the area, as only three communities (Haines, Hyder and Skagway) enjoy direct connections to the contiguous North American road system.
Which forest is the smallest national forest in the US?
A: unanswerable


Context and question: The Ottoman bashi-bazouks brutally suppressed the Bulgarian uprising of 1876, massacring up to 100,000 people in the process. The Russo-Turkish War (1877–78) ended with a decisive victory for Russia. As a result, Ottoman holdings in Europe declined sharply; Bulgaria was established as an independent principality inside the Ottoman Empire, Romania achieved full independence. Serbia and Montenegro finally gained complete independence, but with smaller territories. In 1878, Austria-Hungary unilaterally occupied the Ottoman provinces of Bosnia-Herzegovina and Novi Pazar.
What war occurred from 1877 to 1878?
Answer: Russo-Turkish War


Question: The placing of the nails in the hands, or the wrists is also uncertain. Some theories suggest that the Greek word cheir (χειρ) for hand includes the wrist and that the Romans were generally trained to place nails through Destot's space (between the capitate and lunate bones) without fracturing any bones. Another theory suggests that the Greek word for hand also includes the forearm and that the nails were placed near the radius and ulna of the forearm. Ropes may have also been used to fasten the hands in addition to the use of nails.
Is there an answer to this question: Do theories say if Destot's bones were fractured?

Answer: unanswerable


Problem: Plymouth:

The 1971 Local Government White Paper proposed abolishing county boroughs, which would have left Plymouth, a town of 250,000 people, being administered from a council based at the smaller Exeter, on the other side of the county. This led to Plymouth lobbying for the creation of a Tamarside county, to include Plymouth, Torpoint, Saltash, and the rural hinterland. The campaign was not successful, and Plymouth ceased to be a county borough on 1 April 1974 with responsibility for education, social services, highways and libraries transferred to Devon County Council. All powers returned when the city become a unitary authority on 1 April 1998 under recommendations of the Banham Commission.

What county did Plymouth unsuccessfully attempt to see created?
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A:
Tamarside