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: One of this author's works argues that "political emancipation" is compatible with religion, but blocks\n the fulfillment of "human emancipation." In another of his works, he developed his theory of "base and\n superstructure." This opponent of Bruno Bauer wrote that "Philosophers have only interpreted the world;\n the point is to change it" in his Theses on Feuerbach, as well as writing On the Jewish Question. Another\n of his works argues that a commodity attains value through the amount of labour put into it. For 10 points,\n name this German philosopher who, along with Engels, wrote Das Kapital.

Output: Social Science


Input: Consider Input: When it interacts with ryanodine receptors, this element upregulates its own release, and this compound forms the cell plates of coccolithophores. Stimulation of Gq ("g-sub-q") opens a channel that allows for this ion's movement, and proteins that bind this ion have an EF hand motif. Cellular concentrations of this ion are regulated by IP3. Parafollicular cells of the (*) thyroid produce a compound that reduces the concentration of this ion in blood, and its intestinal absorption requires vitamin D. This ion interacts with Troponin to stimulate muscle contraction, and the lumens of sarcoplasmic reticula have high concentrations of this ion. For 10 points, name this divalent cation that is stored in bones.

Output: Science


Input: Consider Input: Grignard reagents cannot form without the presence of one of these compounds, and tetrahydrofuran is a cyclic version of one of them. Oxonium compounds are formed when they react with strong inorganic or Lewis acids, and oxidation of them results in an unstable peroxide, and they can be formed dehydration of an alcohol or catalytic hydration of an olefin. Manufactured via Williamson synthesis, specialized ones that that surround specific metal ions are referred to as crown types. FTP, identify this class of organic compounds that features an oxygen atom bonded to two carbon atoms.


Output: Science