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: The enzyme LCAT catalyzes the formation of an ester from this compound. Intermediates in the synthesis of this compound include squalene [SKWAY-leen] and mevalonate [muh-VAL-uh-nate], the latter of which is produced by HMG-CoA reductase. Vitamin D is formed from the 7-dehydro form of this compound, which reduces membrane fluidity. This compound, which is transported to the liver by high-density lipoprotein, is linked to heart disease. For 10 points, name this compound whose amount in the blood is lowered by statins such as Crestor and Lipitor.

Output: Science


Input: Consider Input: This force is represented by a first derivative with respect to position in the harmonic oscillator equation. In one model, this force stems from tiny electrostatic repulsions. It can be understood as the parallel shear component of the contact force, whose other component is typically calculated as mg cosine theta. It is calculated from a coefficient, symbolized mu, multiplied by the normal force. Rolling motion is affected by the "kinetic" type of this force, which is known as "drag" in fluids. For 10 points, name this force that resists the motion of objects against one another.

Output: Science


Input: Consider Input: Performing "electro-deoxidation" on an oxide of this metal may be able to improve on the current method of producing it and is called the Fray-Farthing-Chen Process. Along with a heavier element, extremely pure varieties of this element can be produced in the crystal bar process. When this element is combined with two oxygen molecules it yields a compound that produces the asterism in star sapphires, rutile.One method for producing the metallic form of this element yields a "sponge" form of it and replaced the Hunter Process; the creator of that method also devised a way to produce the chemically similar element, Zirconium.This transition metal is extracted in the Kroll process.For 10 points, name this strong, lightweight element with atomic number 22 and symbol Ti.


Output: Science