In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Q: The elimination mechanism by which the dehydration of its major product occurs necessarily involves the abstraction of an acidic hydrogen and displacement of the leaving group. The catalyst in this reaction itself is regenerated from the deprotonation of water in its final step, which results in the conversion of its intermediate, an alkoxide. An aldehyde or ketone had originally undergone a nucleophilic-addition-type process to produce that alkoxide, which had converted it from a nucleophilic enolate using a hydroxide ion catalyst. Producing a final product known as a beta-hydroxyaldehyde, FTP, name this condensation reaction whose name combines that of its two final products.

A: Science
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Q: man angered Isabella de l'Anguileme when he named his brother as the Comte de Poitou. He won a battle against Henry III and the Comte de la Marche before negotiating a truce with Hugh of Lusignan at Taillebourg Bridge. John of Ibelin helped this man to push Fakhr ad-Din to Damietta in his most famous initiative, which later saw the arrival of Alfonso of Poitou at Cairo. He was captured at the Battle of Farsikur during a war that he fought alongside his brother, Robert of Artois. This son of Blanche of Castille and was the leader of the Seventh Crusade. For 10 points, name this ruler from 1226 to 1270, the only French king to be canonized.

A: History
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Q: Unlike its partner, it does not change sign under spatial reflection, though it does change sign under time reflection, and its boundary conditions stipulate that its normal component must be continuous across a boundary between media. The great strength of this property for a neutron star results in the formation of two "hot sports" on its surface and is responsible for the short timescale of a neutron star's rotational damping. A spin will precess around an applied one, and an equation which states that it is divergence-free indicates that classically, its monopoles do not exist. FTP identify this physical quantity whose behavior is governed by such equations as Ampere's law, the dual of the electric field.

A:
Science
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