TASK DEFINITION: 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.
PROBLEM: The yield of these compounds can be increased through ball milling of some of their components, and one mode of operation of these compounds proceeds through a mechanism called enantiomorphic site control. A process for the operation of these compounds that proceeds through migratory insertions and obeys the "principle of least nuclear motions" was developed by Cossee and Arlman. Compounds such bis(cyclopentadienyl)titanium chloride and bis(indenyl)zirconium dichloride, known as metallocenes, have been developed as an alternative to the traditional compounds of this type. Those traditional initiators include vanadium trichloride and triethylaluminum, and the product of the application of these compounds to alkenes can result in syndiotactic, isotactic, or atactic products. For ten points, identify these stereoselective compounds used to initiate polymerization, named for a German and an Italian chemist.

SOLUTION: Science

PROBLEM: It is not serotonin, but the selective reuptake of this compound is inhibited by tiagabine, and it is converted to succinic acid semi-aldehyde, which is subsequently oxidized to succinic acid in the shunt which produces this compound. One receptor for it forms a heteropentameric complex and in immature neurons, this compound facilitates the outward flux of chloride ions, which is why benzodiazepines are ineffective anticonvulsants in newborns. One receptor for it includes a benzodiazepine binding site, and isoguvacine THIP, and muscimol serve as competitive agonists to this molecule. Synthesized by the decarboxylation of glutamic acid, this neurotransmitter is best known for its role as the chief inhibitory neurotransmitter. For 10 points, identify this neurotransmitter, which is often referred to by its four letter acronym.

SOLUTION: Science

PROBLEM: The Monophysite patriarch of this city, Sophronius, negotiated protection for his community before it fell to a man who humbly entered it leading his own slave. Balian of Ibelin unsuccessfully defended this city against a siege, and the status of this city was eventually confirmed by the Treaty of Ramla after the Battle of Arsuf. Raymond of St. Gilles and (*) Godfrey of Bouillon were rivals to control this city. A barefoot procession around this city--which was once led by the leprous Baldwin IV--preceded its capture from the Fatimid Dynasty in 1099, whereupon its Muslim and Jewish populations were massacred and the al-Aqsa Mosque turned into a stable until it was recaptured 88 years later by Saladin. For 10 points, identify this city that was the target of the First and Third Crusades.

SOLUTION:
History