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.

Input: Consider Input: An approximation of it named for Russell uses the TDS value to determine one of its parameters via the Langelier approximation, while one constant that appears in it has units of moles per kilogram to the one half power, according the Bates-Guggenheim convention. Along with Guggenheim, Scatchard and Bronsted improved upon this model by developing the SIT theory, and that model has a better fit than a modification of it named for Davies. This relationship assumes the existence of only long-range interactions, and it was extended to account for Brownian motion by Lars Onsager. It assumes that the solvent is structure-less and that the solution is dilute, and the theory behind it implies that the electrostatic potential falls off exponentially when r is greater than the atomic radius due to screening by counter ions. For 10 points, identify this equation which is used to calculate the activity coefficients, and is named for a German and a Dutch scientist.

Output: Science

Input: Consider Input: One reactant for this reaction is best prepared by an S N 2 nucleophilic addition of a triphenyl compound, followed by elimination of the hydrogen halide by an organolithium reagent. This reaction itself proceeds through a rather unique intermediate formed when the pi electron from the reagents carbon-oxygen double bond migrates to the positively charged pole of one reactant; this intermediate is called a an oxaphosphetane, from which a triphenyl oxide is eliminated to complete the reaction. The aforementioned positively charged pole is on phosphorous because the aforementioned prepared reactant is a phosphorous ylide. For ten points, name this reaction that produces selectively double-bonded alkenes from aldehydes and phosphorous ylides and that is named for the German 1979 Chemistry Nobel winner.

Output: Science

Input: Consider Input: One architect from this country designed the library at Mount Angel Abbey in Oregon, and another worked with Albert Kahn on Michigan's Cranbrook Educational Community using ideas from the arts- and-crafts movement. Another notable architect from here once drew diagrams for bomb disassembly manuals before designing Noyes dormitory at Vassar and Ingalls ice skating rink at his alma mater, Yale. That same architect from here invented the (*) chair made of aluminum and fiberglass shown on Star Trek, the Tulip Chair. Architects from this country designed MIT's Kresge auditorium and the MIT dorm Baker House, in addition to Washington Dulles International airport. For 10 points, give this country home to the designers of the Essen Opera house and the Gateway Arch, Alvar Aalto and Eero Saarinen.
Output: Fine Arts