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.

Context: Humans use six times as much water today as they did 100 years ago. People living in developed countries use a far greater proportion of the worlds water than people in less developed countries. What do people use all of that water for? Besides drinking and washing, people need water for agriculture, industry, household uses, and recreation (Figure Water use can be consumptive or non-consumptive, depending on whether the water is lost to the ecosystem. Non-consumptive water use includes water that can be recycled and reused. For example, the water that goes down the drain and enters the sewer system is purified and then redistributed for reuse. By recycling water, the overall water consumption is reduced. Consumptive water use takes the water out of the ecosystem. Can you name some examples of consumptive water use? Some of the worlds farmers still farm without irrigation by choosing crops that match the amount of rain that falls in their area. But some years are wet and others are dry. For farmers to avoid years in which they produce little or no food, many of the worlds crops are produced using irrigation. Water used for home, industrial, and agricultural purposes in different regions. Globally more than two-thirds of water is for agriculture. Three popular irrigation methods are: Overhead sprinklers. Trench irrigation: canals carry water from a water source to the fields. Flood irrigation: fields are flooded with water. All of these methods waste water. Between 15% and 36% percent of the water never reaches the crops because it evaporates or leaves the fields as runoff. Water that runs off a field often takes valuable soil with it. A much more efficient way to water crops is drip irrigation (Figure 1.2). With drip irrigation, pipes and tubes deliver small amounts of water directly to the soil at the roots of each plant or tree. The water is not sprayed into the air or over the ground, so nearly all of it goes directly into the soil and plant roots. Why do farmers use wasteful irrigation methods when water-efficient methods are available? Many farmers and farming corporations have not switched to more efficient irrigation methods for two reasons: 1. Drip irrigation and other more efficient irrigation methods are more expensive than sprinklers, trenches, and flooding. 2. In the United States and some other countries, the government pays for much of the cost of the water that is used for agriculture. Because farmers do not pay the full cost of their water use, they do not have any financial incentive to use less water. What ideas can you come up with to encourage farmers to use more efficient irrigation systems? Aquaculture is a different type of agriculture. Aquaculture is farming to raise fish, shellfish, algae, or aquatic plants (Figure 1.3). As the supplies of fish from lakes, rivers, and the oceans dwindle, people are getting more fish from aquaculture. Raising fish increases our food resources and is especially valuable where protein sources are limited. Farmed fish are becoming increasingly common in grocery stores all over the world. Workers at a fish farm harvest fish they will sell to stores. Growing fish in a large scale requires that the fish stocks are healthy and protected from predators. The species raised must be hearty, inexpensive to feed, and able to reproduce in captivity. Wastes must be flushed out to keep animals healthy. Raising shellfish at farms can also be successful. For some species, aquaculture is very successful and environmental harm is minimal. But for other species, aqua- culture can cause problems. Natural landscapes, such as mangroves, which are rich ecosystems and also protect coastlines from storm damage, may be lost to fish farms (Figure 1.4). For fish farmers, keeping costs down may be a problem since coastal land may be expensive and labor costs may be high. Large predatory fish at the 4th or 5th trophic level must eat a lot, so feeding large numbers of these fish is expensive and environmentally costly. Farmed fish are genetically different from wild stocks, and if they escape into the wild they may cause problems for native fish. Because the organisms live so close together 
 Question: water that can be recycled and reused is called ____________water use.
non-consumptive

Context: The mechanism of action, pharmacokinetics, and use of flumazenil in benzodiazepine overdose, as well as in the management of other disease states, are reviewed. Flumazenil interacts at the central benzodiazepine receptor to antagonize or reverse the behavioral, neurologic, and electrophysiologic effects of benzodiazepine agonists and inverse agonists. Flumazenil has been studied for a variety of indications, including as an antidote to benzodiazepine overdose and for awakening of comatose patients, reversal of sedation after surgery and in critically ill patients, and management of hepatic encephalopathy. It improves the level of consciousness in patients with benzodiazepine overdose; however, resedation may occur within one to two hours after administration, so repeated doses or a continuous infusion may be required to maintain therapeutic efficacy. It appears to be effective in reversing sedation induced by midazolam or diazepam, and case reports suggest that it is useful in awakening comatose patients, although its clinical utility is questionable. Flumazenil has proved useful in reversing conscious sedation in critically ill patients, although response may be dose dependent. Animal models indicate that flumazenil is of some benefit in hepatic encephalopathy, but until well-designed clinical trials are conducted, hepatic encephalopathy must be considered an investigational indication for flumazenil. Adverse reactions include CNS manifestations, resedation, cardiovascular effects, seizures, and alterations in intracranial pressure and cerebral perfusion pressure. Hepatic dysfunction results in a substantial change in the pharmacokinetic profile of flumazenil; therefore, dosage adjustment may be necessary in patients with hepatic dysfunction or in those receiving medications that alter flumazenil metabolism. Flumazenil has been shown to reverse sedation caused by intoxication with benzodiazepines alone or benzodiazepines in combination with other agents, but it should not be used when cyclic antidepressant intoxication is suspected. It may be beneficial after surgery when benzodiazepines have been used as part of anesthesia and after a diagnostic or surgical procedure when assessment of CNS function is necessary. 
 Question: Which drug should be used as an antidote in benzodiazepine overdose?
flumazenil

Context: A Viking boy called Hiccup (voice: Jay Baruchel) introduces his village of Berk ("it's been here for seven generations, but every single building is new"). The village is attacked by dragons, who steal food (mostly sheep) and set things on fire (hence all the new buildings). The villagers grab weapons and try to fight the dragons off. Despite being told by every adult in sight to go indoors, Hiccup hauls out a bolas-shooting cannon he made himself and shoots a dragon out of the night sky. (As assistant to the village blacksmith, Gobber (voice: Craig Ferguson), Hiccup has access to tools and materials and knows how to use them.) The dragon lands in the woods some distance form the village and no one believes that he hit anything, so it's the next day before Hiccup can go looking for it. It turns out to be a rare and deadly Night Fury, but Hiccup can't make himself kill it. Instead he releases it -- whereupon it also refrains from killing Hiccup -- and it flies off through the trees.Hiccup discovers that the dragon (which he eventually calls Toothless because of its retractable teeth) has holed up in a steep-sided valley because it can no longer fly more than a few feet at a time. While sketching the dragon, Hiccup realizes that it's missing a tail fin. He makes a prosthetic tail fin out of leather. The new fin helps, but Toothless can't control it and inadvertently takes Hiccup for a ride, giving him a clear idea of what's needed to help the dragon fly right. In a series of workshop and test flight scenes, Hiccup builds and perfects a saddle, a control mechanism for the tail fin, and a safety harness.Meanwhile, Hiccup's father Stoick (voice: Gerard Butler) has signed him up for dragon training with Gobber, which is very different from the training he's already doing with Toothless: he's going to learn to fight dragons. At first, he's the worst student in the class. Since Hiccup has always been an accident-prone klutz, this comes as no surprise to his classmates Astrid (voice: America Ferrera), Snotlout (voice: Jonah Hill), Fishlegs (voice: Christopher Mintz-Plasse), Ruffnut (voice: Kristen Wiig), and her twin brother Tuffnut (voice: T.J. Miller). (Hiccup's a little sweet on Astrid.) Before long, Hiccup is able to use some things he's learned while working with Toothless to soothe and manage the school's practice dragons. (It turns out dragons are just big kitty-cats: they like to be petted, there's a kind of grass that's like cat-nip to them, and they love fish (but hate eels).) When Stoick returns from a failed search for the fabled nest of the dragons, he's surprised but thrilled to hear that his son is doing brilliantly at dragon training. He gives Hiccup a horned helmet made from one of his dead mother's breastplates. But Hiccup, as usual, is unable to get around his father's expectations and speak frankly, so he can't explain that his success at dragon school is unlikely to lead to the slaying of any dragons.When Hiccup subdues a practice dragon, unintentionally earning the privilege of killing it before the entire village, he's horrified and decides to flee with Toothless. However Astrid, having noticed Hiccup's frequent disappearances and secretive behavior, is suspicious. She follows him to the hidden valley and sees Toothless. Unable to explain his relationship with the dragon, Hiccup takes her flying, and she's captivated. But they get caught up in a flock of dragons returning to their nest carrying food. The dragons fly inside a mountainous island and drop the food into a pit, which turns out to contain a huge, terrifying, and very hungry dragon that eats the smaller ones if they don't bring it enough food. Hiccup and Astrid and shocked to realize that the dragons have been stealing their sheep to keep from being eaten themselves. When they get home, 
 Question: What kind of class is Hiccup attending?

dragon training