Input: Article: In the absence of atmospheric oxygen (O
2), in deep geological conditions prevailing far away from Earth atmosphere, hydrogen (H
2) is produced during the process of serpentinization by the anaerobic oxidation by the water protons (H+) of the ferrous (Fe2+) silicate present in the crystal lattice of the fayalite (Fe
2SiO
4, the olivine iron-endmember). The corresponding reaction leading to the formation of magnetite (Fe
3O
4), quartz (SiO
2) and hydrogen (H
2) is the following:

Now answer this question: How is hydrogen produced when there is no atmospheric oxygen?

Output: serpentinization by the anaerobic oxidation

Article: Major corporations with headquarters in Tennessee include FedEx, AutoZone and International Paper, all based in Memphis; Pilot Corporation and Regal Entertainment Group, based in Knoxville; Eastman Chemical Company, based in Kingsport; the North American headquarters of Nissan Motor Company, based in Franklin; Hospital Corporation of America and Caterpillar Financial, based in Nashville; and Unum, based in Chattanooga. Tennessee is also the location of the Volkswagen factory in Chattanooga, a $2 billion polysilicon production facility by Wacker Chemie in Bradley County, and a $1.2 billion polysilicon production facility by Hemlock Semiconductor in Clarksville.

Question: Which major global shipping company is based in Memphis?
Ans: FedEx

Here is a question about this article: 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. Francois 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 Dobereiner's lamp and limelight were invented in 1823.
What is the answer to this question: In what year Did James Dewar first liquidize hydrogen?
****
So... 1898

The problem: Answer a question about this article:
Plymouth is often used as a base by visitors to Dartmoor, the Tamar Valley and the beaches of south-east Cornwall. Kingsand, Cawsand and Whitsand Bay are popular.
Visitors to what local valley often stop over in Plymouth?
****
The answer: Tamar Valley

Problem: Please answer a question about the following article about Edmund Burke:
Initially, Burke did not condemn the French Revolution. In a letter of 9 August 1789, Burke wrote: "England gazing with astonishment at a French struggle for Liberty and not knowing whether to blame or to applaud! The thing indeed, though I thought I saw something like it in progress for several years, has still something in it paradoxical and Mysterious. The spirit it is impossible not to admire; but the old Parisian ferocity has broken out in a shocking manner". The events of 56 October 1789, when a crowd of Parisian women marched on Versailles to compel King Louis XVI to return to Paris, turned Burke against it. In a letter to his son, Richard Burke, dated 10 October he said: "This day I heard from Laurence who has sent me papers confirming the portentous state of Francewhere the Elements which compose Human Society seem all to be dissolved, and a world of Monsters to be produced in the place of itwhere Mirabeau presides as the Grand Anarch; and the late Grand Monarch makes a figure as ridiculous as pitiable". On 4 November Charles-Jean-Francois Depont wrote to Burke, requesting that he endorse the Revolution. Burke replied that any critical language of it by him should be taken "as no more than the expression of doubt" but he added: "You may have subverted Monarchy, but not recover'd freedom". In the same month he described France as "a country undone". Burke's first public condemnation of the Revolution occurred on the debate in Parliament on the army estimates on 9 February 1790, provoked by praise of the Revolution by Pitt and Fox:
Who requested that Burke support the French Revolution?
A: Charles-Jean-Francois Depont

Question: Read this and answer the question

New York became the most populous urbanized area in the world in the early 1920s, overtaking London. The metropolitan area surpassed the 10 million mark in the early 1930s, becoming the first megacity in human history. The difficult years of the Great Depression saw the election of reformer Fiorello La Guardia as mayor and the fall of Tammany Hall after eighty years of political dominance.

What is the term for a city with a population of over 10 million?
Answer:
megacity