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]: An 1889 strike of dockworkers in this city was settled at Millwall and mediated by Edward Manning. A wildly popular account of this city's underbelly was published by Ned Ward, who also described how the Mohawks and Hawkubites terrorized the women of this city. Joseph Bazalgette was largely responsible for redesigning this metropolitan area's sewer system after the Great Stink occurred. The police force of this city received the "Dear Boss" and "From Hell" letters, which enigmatically predicted a grisly set of crimes. Henry Cole organized an event in this city that displayed "the works of industry of all nations" in its Joseph Paxtondesigned structure. Its Whitechapel district was home to a series of unsolved murders. For 10 points, the Great Exhibition of 1851 took place in what city, which was also home to the Jack The Ripper killings
[A]: History

[Q]: Ninhydrin forms a Schiff base with this chemical, resulting in a hue known as Ruhemanns purple. The Birch reduction takes place in a liquid substrate of it, the reason it is common in methamphetamine labs. The Kjeldahl method uses this molecule as an end-product to measure the amount of nitrogen in a sample, and it is oxidized in the first step of a nitric acid forming procedure, the Ostwald process. For 10 points, name this weak base found in fertilizers, formed by combining hydrogen and nitrogen in a three-to-one ratio in the Haber process.
[A]: Science

[Q]: The aria ""Vedrommi Intorno"" is sung by the titular King of Crete in this man's opera Idomeneo. Another of his operas contains the aria "Ho capito, signor, si" and contains the character Leporello, the servant of a character who kills Donna Anna's father and is dragged to hell at the end of the opera. This man composed ""The Queen of the Night Aria"" for a well-known piece, and in yet another opera with music composed by him, Ferrando and Guglielmo try to seduce each other's wives; that opera is Cosi fan tutte (""TWO""-tee). For 10 points name this Austrian composer of the operas Don Giovanni and The Magic Flute.
[A]:
Fine Arts