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Zapatist forces, which were based in neighboring Morelos had strengths in the southern edge of the Federal District, which included Xochimilco, Tlalpan, Tláhuac and Milpa Alta to fight against the regimes of Victoriano Huerta and Venustiano Carranza. After the assassination of Carranza and a short mandate by Adolfo de la Huerta, Álvaro Obregón took power. After willing to be re-elected, he was killed by José de León Toral, a devout Catholic, in a restaurant near La Bombilla Park in San Ángel in 1928. Plutarco Elias Calles replaced Obregón and culminated the Mexican Revolution.
Where was Alvaro Obregon killed? 
A: in a restaurant near La Bombilla Park in San Ángel

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In 1807, Thomas Young was possibly the first to use the term "energy" instead of vis viva, in its modern sense. Gustave-Gaspard Coriolis described "kinetic energy" in 1829 in its modern sense, and in 1853, William Rankine coined the term "potential energy". The law of conservation of energy was also first postulated in the early 19th century, and applies to any isolated system. It was argued for some years whether heat was a physical substance, dubbed the caloric, or merely a physical quantity, such as momentum. In 1845 James Prescott Joule discovered the link between mechanical work and the generation of heat.
When was the law of conservation of physics first postulated?
A: unanswerable

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At the same time, some Alsatians were in opposition to the Jacobins and sympathetic to the invading forces of Austria and Prussia who sought to crush the nascent revolutionary republic. Many of the residents of the Sundgau made "pilgrimages" to places like Mariastein Abbey, near Basel, in Switzerland, for baptisms and weddings. When the French Revolutionary Army of the Rhine was victorious, tens of thousands fled east before it. When they were later permitted to return (in some cases not until 1799), it was often to find that their lands and homes had been confiscated. These conditions led to emigration by hundreds of families to newly vacant lands in the Russian Empire in 1803–4 and again in 1808. A poignant retelling of this event based on what Goethe had personally witnessed can be found in his long poem Hermann and Dorothea.
Which two countries sought to crush the nascent republic?
A: Austria and Prussia

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During the English Civil War the majority of Londoners supported the Parliamentary cause. After an initial advance by the Royalists in 1642 culminating in the battles of Brentford and Turnham Green, London was surrounded by defensive perimeter wall known as the Lines of Communication. The lines were built by an up to 20,000 people, and were completed in under two months. The fortifications failed their only test when the New Model Army entered London in 1647, and they were levelled by Parliament the same year.
What was the defensive wall that encircled London in 1642 called?
A:
the Lines of Communication