The problem: Answer a question about this article:
Upon the invitation of Duke Konrad I of Masovia, the Teutonic Knights took possession of Prussia in the 13th century and created a monastic state to administer the conquered Old Prussians. Local Old-Prussian (north) and Polish (south) toponyms were gradually Germanised. The Knights' expansionist policies, including occupation of Polish Pomerania with Gdansk/Danzig and western Lithuania, brought them into conflict with the Kingdom of Poland and embroiled them in several wars, culminating in the Polish-Lithuanian-Teutonic War, whereby the united armies of Poland and Lithuania, defeated the Teutonic Order at the Battle of Grunwald (Tannenberg) in 1410. Its defeat was formalised in the Second Treaty of Thorn in 1466 ending the Thirteen Years' War, and leaving the former Polish region Pomerania/Pomerelia under Polish control. Together with Warmia it formed the province of Royal Prussia. Eastern Prussia remained under the Knights, but as a fief of Poland. 1466 and 1525 arrangements by kings of Poland were not verified by the Holy Roman Empire as well as the previous gains of the Teutonic Knights were not verified.
Which two areas were slowly Germanized during the 13th century?
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The answer: Old-Prussian (north) and Polish (south) toponyms

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808s & Heartbreak, which features extensive use of the eponymous Roland TR-808 drum machine and contains themes of love, loneliness, and heartache, was released by Island Def Jam to capitalize on Thanksgiving weekend in November 2008. Reviews were positive, though slightly more mixed than his previous efforts. Despite this, the record's singles demonstrated outstanding chart performances. Upon its release, the lead single "Love Lockdown" debuted at number three on the Billboard Hot 100 and became a "Hot Shot Debut", while follow-up single "Heartless" performed similarly and became his second consecutive "Hot Shot Debut" by debuting at number four on the Billboard Hot 100. While it was criticized prior to release, 808s & Heartbreak had a significant effect on hip-hop music, encouraging other rappers to take more creative risks with their productions.
Which album by Kanye West featured the song "Love Lockdown"?
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The answer: 808s & Heartbreak

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There exist two different spin isomers of hydrogen diatomic molecules that differ by the relative spin of their nuclei. In the orthohydrogen form, the spins of the two protons are parallel and form a triplet state with a molecular spin quantum number of 1 (12+12); in the parahydrogen form the spins are antiparallel and form a singlet with a molecular spin quantum number of 0 (1212). At standard temperature and pressure, hydrogen gas contains about 25% of the para form and 75% of the ortho form, also known as the "normal form". The equilibrium ratio of orthohydrogen to parahydrogen depends on temperature, but because the ortho form is an excited state and has a higher energy than the para form, it is unstable and cannot be purified. At very low temperatures, the equilibrium state is composed almost exclusively of the para form. The liquid and gas phase thermal properties of pure parahydrogen differ significantly from those of the normal form because of differences in rotational heat capacities, as discussed more fully in spin isomers of hydrogen. The ortho/para distinction also occurs in other hydrogen-containing molecules or functional groups, such as water and methylene, but is of little significance for their thermal properties.
What state are the protons in when in the orthohydrogen form?
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The answer: triplet state

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The discovery of infrared radiation is ascribed to William Herschel, the astronomer, in the early 19th century. Herschel published his results in 1800 before the Royal Society of London. Herschel used a prism to refract light from the sun and detected the infrared, beyond the red part of the spectrum, through an increase in the temperature recorded on a thermometer. He was surprised at the result and called them "Calorific Rays". The term 'Infrared' did not appear until late in the 19th century.
To whom did Herschel present his work on infrared radiation?
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The answer:
the Royal Society of London