Input: Read this: Serotonin is a neuromodulator involved in regulation of mood and behavior. Development in the limbic system plays an important role in determining rewards and punishments and processing emotional experience and social information. Changes in the levels of the neurotransmitters dopamine and serotonin in the limbic system make adolescents more emotional and more responsive to rewards and stress. The corresponding increase in emotional variability also can increase adolescents' vulnerability. The effect of serotonin is not limited to the limbic system: Several serotonin receptors have their gene expression change dramatically during adolescence, particularly in the human frontal and prefrontal cortex .
Question: Which neuromodulator is involved in regulation of mood and behavior?

Output: Serotonin


QUES: From 1898, it was commonly accepted that the name was of Celtic origin and meant place belonging to a man called *Londinos; this explanation has since been rejected. Richard Coates put forward an explanation in 1998 that it is derived from the pre-Celtic Old European *(p)lowonida, meaning 'river too wide to ford', and suggested that this was a name given to the part of the River Thames which flows through London; from this, the settlement gained the Celtic form of its name, *Lowonidonjon; this requires quite a serious amendment however. The ultimate difficulty lies in reconciling the Latin form Londinium with the modern Welsh Llundain, which should demand a form *(h)lōndinion (as opposed to *londīnion), from earlier *loundiniom. The possibility cannot be ruled out that the Welsh name was borrowed back in from English at a later date, and thus cannot be used as a basis from which to reconstruct the original name.

In what year did Richard Coates offer a differing explanation as to the origins of London's name?
What is the answer?
ANS: 1998


QUES: The book was never published. Instead the Normans whirled off to New York. Norman published the gist of his planned travel book curiously mixed with vituperation against the Ottoman Empire in an article in June, 1896, in Scribner's Magazine. The empire had descended from an enlightened civilization ruling over barbarians for their own good to something considerably less. The difference was the Hamidian Massacres, which were being conducted even as the couple traveled the Balkans. According to Norman now, the empire had been established by "the Moslem horde" from Asia, which was stopped by "intrepid Hungary." Furthermore, "Greece shook off the turbaned destroyer of her people" and so on. The Russians were suddenly liberators of oppressed Balkan states. Having portrayed the Armenians as revolutionaries in the name of freedom with the expectation of being rescued by the intervention of Christian Europe, he states "but her hope was vain." England had "turned her back." Norman concluded his exhortation with "In the Balkans one learns to hate the Turk." Norman made sure that Gladstone read the article. Prince Nicolas of Montenegro wrote a letter thanking him for his article.
Who did Norman say "turned her back"?

ANS: England


Eastern deciduous forests are subject to a number of serious insect and disease outbreaks. Among the most conspicuous is that of the introduced gypsy moth (Lymantria dispar), which infests primarily oaks, causing severe defoliation and tree mortality. But it also has the benefit of eliminating weak individuals, and thus improving the genetic stock, as well as creating rich habitat of a type through accumulation of dead wood. Because hardwoods sprout so readily, this moth is not as harmful as the hemlock woolly adelgid. Perhaps more serious is the introduced beech bark disease complex, which includes both a scale insect (Cryptococcus fagisuga) and fungal components.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What is worse than the hemlock woolly adelgid?
Ah, so.. unanswerable


Question: Neptune's dark spots are thought to occur in the troposphere at lower altitudes than the brighter cloud features, so they appear as holes in the upper cloud decks. As they are stable features that can persist for several months, they are thought to be vortex structures. Often associated with dark spots are brighter, persistent methane clouds that form around the tropopause layer. The persistence of companion clouds shows that some former dark spots may continue to exist as cyclones even though they are no longer visible as a dark feature. Dark spots may dissipate when they migrate too close to the equator or possibly through some other unknown mechanism.
Try to answer this question if possible:  What do Neptune's light spots appear as in the cloud decks?
Answer: unanswerable


Input: Read this: Miami's heavy-rail rapid transit system, Metrorail, is an elevated system comprising two lines and 23 stations on a 24.4-mile (39.3 km)-long line. Metrorail connects the urban western suburbs of Hialeah, Medley, and inner-city Miami with suburban The Roads, Coconut Grove, Coral Gables, South Miami and urban Kendall via the central business districts of Miami International Airport, the Civic Center, and Downtown. A free, elevated people mover, Metromover, operates 21 stations on three different lines in greater Downtown Miami, with a station at roughly every two blocks of Downtown and Brickell. Several expansion projects are being funded by a transit development sales tax surcharge throughout Miami-Dade County.
Question: How many miles long is Metrorail?

Output:
24.4