TASK DEFINITION: Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.
PROBLEM: Context: Jack Elgin is the European editor of The Economist, which is based in London, England. Jack has a wife named Maria and three kids named Joanne, Julia, and Andrew. Jack subtly changes the family vacation from a lazy week of Mediterranean fun and sun in Corfu, Greece, to a tour of India, because of a story he has to cover. Maria is not as impressed by this as the kids are. Jack himself envisioned a chance to simultaneously work an easy reporting assignment and spend a little quality time with his family. But on the way to India, the airplane, a 747 owned by AM Air, an American airline, makes an unscheduled stopover in Limassol Cyprus, because of a mechanical problem. After a while of waiting inside the Limassol airport, everyone gets back on the plane -- which is then hijacked by a group of terrorists known as the August 15th Movement, led by a Serbian man named Ivanic Loyvek and his right-hand man Karadan Maldic. The terrorists take a silver briefcase from an diplomatic courier, an older man, and it appears to be an important object of their hijack. And they are demanding $50,000,000 from the US State Department in one hour, or everyone on the airplane will die.The demand is met, and Loyvek and Maldic start releasing the women and children, with the men to go last. But as soon as a front passenger door is opened, the local police begins shooting. Inside the plane, the owner of the briefcase retrieves it, only to be killed the terrorists, who take it again.The flight attendants frantically open the rest of the airplane's doors and start getting passengers out, but the terrorists start killing passengers, leading to an explosion. Maria, Joanne, and Julia get out of the airplane, and then Jack, holding Andrew, gets out -- only to watch Maria, Joanne, and Julia get shot by the terrorists. Jack tries to hide Andrew's face so he can't see. Maria and Joanne are killed, but Julia burns to death while crying for help.Jack and Andrew survive. 15 passengers die, and Loyvek and Maldic, the surviving terrorists, escape, knowing that they now have the $50,000,000. Back in London, a devastated Jack is told that the terrorists were captured, but they were released and deported secretly, with no charges and no arrest, the result of some awfully compromised politics. Jack is understandably enraged that Loyvek and Maldic got off scot-free. While helping Andrew cope, Jack tries all the legal ways to ensure justice for his family, but to no avail.Jack even pays a visit to Henry Davidson, a CIA agent who works at the American Embassy in London. Davidson tells Jack that there's little that can be done. The American and British governments are completely impotent when it comes to going after Loyvek and Maldic. Jack decides he has no choice in the matter but to seek revenge. With the help of his ex-intelligence operative friend Kate Stockton, who is well-schooled in the finer points of international intelligence, Jack becomes a one-man anti-terrorist squadron, searching for Loyvek and Maldich. He finds a warehouse they apparently are using as a headquarters. Breaking in, he finds some papers which he takes, and some weapons. The terrorists return, find a flashlight Jack was using, and begin searching the warehouse. Jack returns upstairs, retrieves a machine pistol and loads it with a magazine. He kills three terrorists before escaping.He later breaks into the home of a friend at MI6 and steals a Walther PPK pistol from his home. He shows up at a theatre and makes a scene at the bar, to be sure he is noticed by the bartender. He then follows one of the terrorists in his taxicab, killing him with that weapon. He returns to the theatre and makes a point of apologizing to the bartender. The next day he goes pheasant hunting with his MI6 contact in case he is tested for gunpowder residue.Dogging Jack's trail is FBI agent Jules Bernard, who's cooperating with Scotland Yard on anti-terrorist activities, and who suspects
Question: Who is Jack's wife?

SOLUTION: maria

PROBLEM: Context: Mutations of SLC9A6 may cause an X-linked clinical syndrome first described by Christianson in 1999 in which affected males exhibited profound intellectual disability, autism, drug-resistant epilepsy, ophthalmoplegia, mild craniofacial dysmorphism, microcephaly, and ataxia. We describe a child with an SLC9A6 mutation and an electroencephalographic pattern consistent with electrographic status epilepticus of sleep. Our patient's electrographic status epilepticus of sleep resolved after treatment with felbamate. Following treatment, he remained seizure-free but did not make significant or lasting gains in language. Our report extends the clinical epilepsy phenotype in children with SLC9A6 mutations to include electrographic status epilepticus of sleep. In addition, felbamate was an effective treatment for electrographic status epilepticus of sleep in our patient.
Question: Mutation of which gene is implicated in the Christianson syndrome?

SOLUTION: slc9a6

PROBLEM: Context: Thermohaline circulation drives deep ocean circulation. Thermo means heat and haline refers to salinity. Dif- ferences in temperature and in salinity change the density of seawater. So thermohaline circulation is the result of density differences in water masses because of their different temperature and salinity. What is the temperature and salinity of very dense water? Lower temperature and higher salinity yield the densest water. When a volume of water is cooled, the molecules move less vigorously, so same number of molecules takes up less space and the water is denser. If salt is added to a volume of water, there are more molecules in the same volume, so the water is denser. Changes in temperature and salinity of seawater take place at the surface. Water becomes dense near the poles. Cold polar air cools the water and lowers its temperature, increasing its salinity. Fresh water freezes out of seawater to become sea ice, which also increases the salinity of the remaining water. This very cold, very saline water is very dense and sinks. This sinking is called downwelling. This video lecture discusses the vertical distribution of life in the oceans. Seawater density creates currents, which provide different habitats for different creatures: Click image to the left or use the URL below. URL: Two things then happen. The dense water pushes deeper water out of its way and that water moves along the bottom of the ocean. This deep water mixes with less dense water as it flows. Surface currents move water into the space vacated at the surface where the dense water sank (Figure 1.1). Water also sinks into the deep ocean off of Antarctica. Cold water (blue lines) sinks in the North Atlantic, flows along the bottom of the ocean and upwells in the Pacific or Indian. The water then travels in surface currents (red lines) back to the North Atlantic. Deep water also forms off of Antarctica. Since unlimited amounts of water cannot sink to the bottom of the ocean, water must rise from the deep ocean to the surface somewhere. This process is called upwelling (Figure 1.2). Upwelling forces denser water from below to take the place of less dense water at the surface that is pushed away by the wind. Generally, upwelling occurs along the coast when wind blows water strongly away from the shore. This leaves a void that is filled by deep water that rises to the surface. Upwelling is extremely important where it occurs. During its time on the bottom, the cold deep water has collected nutrients that have fallen down through the water column. Upwelling brings those nutrients to the surface. Those nutrients support the growth of plankton and form the base of a rich ecosystem. California, South America, South Africa, and the Arabian Sea all benefit from offshore upwelling. Upwelling also takes place along the Equator between the North and South Equatorial Currents. Winds blow the surface water north and south of the Equator, so deep water undergoes upwelling. The nutrients rise to the surface and support a great deal of life in the equatorial oceans. Click image to the left or use the URL below. URL:
Question: what helps to bring cool, nutrient-rich water to the surface?

SOLUTION:
upwelling