instruction:
Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.
question:
In the mid 1900s, people were startled to see the Cuyahoga River in Cleveland, Ohio, burst into flames! The river was so polluted with oil and other industrial wastes that it was flammable. Nothing could live in it. You can see the Cuyahoga River in Figure 21.16 Disasters such as rivers burning led to new U.S. laws to protect the water. For example, the Environmental Protection Agency (EPA) was established, and the Clean Water Act was passed. Now, water is routinely tested. Pollution is tracked to its source, and polluters are forced to fix the problem and clean up the pollution. They are also fined. These consequences have led industries, agriculture, and communities to pollute the water much less than before. Most water pollution comes from industry, agriculture, and municipal sources. Homes are part of the municipal source and the individuals and families that live in them can pollute the water supply. What can you do to reduce water pollution? Read the tips below. Properly dispose of motor oil and household chemicals. Never pour them down the drain. Also, dont let them spill on the ground. This keeps them out of storm sewers and bodies of water. Use fewer lawn and garden chemicals. Use natural products instead. For example, use compost instead of fertilizer. Or grow plants that can thrive on their own without any extra help. Repair engine oil leaks right away. A steady drip of oil from an engine can quickly add up to gallons. When the oil washes off driveways and streets it can end up in storm drains and pollute the water supply. Dont let pet litter or pet wastes get into the water supply (see Figure 21.17). The nitrogen they contain can cause overgrowth of algae. The wastes may also contain bacteria and other causes of disease. Water treatment is a series of processes that remove unwanted substances from water. The goal of water treatment is to make the water safe to return to the natural environment or to the human water supply. Treating water for other purposes may not include all the same steps. Thats because water used in agriculture or industry may not have to be as clean as drinking water. You can see how water for drinking is treated in Figure 21.18. Treating drinking water requires at least four processes: 1. Chemicals are added to untreated water. They cause solids in the water to clump together. This is called coagulation. 2. The water is moved to tanks. The clumped solids sink to the bottom of the water. This is called sedimentation. 3. The water is passed through filters that remove smaller particles from the water. This is called filtration. 4. Chlorine is added to the water to kill bacteria and other microbes. This is called disinfection. Finally, the water is pure enough to drink. Conserving water means using less of it. Of course, this mostly applies to people in the wealthy nations that have the most water and also waste the most. Irrigation is the single biggest use of water. Overhead irrigation wastes a lot of water. Drip irrigation wastes a lot less. Figure 21.19 shows a drip irrigation system. Water pipes run over the surface of the ground. Tiny holes in the pipes are placed close to each plant. Water slowly drips out of the holes and soaks into the soil around the plants. Very little of the water evaporates or runs off the ground. Some communities save water with rationing. Much rationing takes place only during times of drought. During rationing, water may not be used for certain things. For example, communities may ban lawn watering and car washing. People may be fined if they use water in these ways. You can do your part. Follow any bans where you live. Its easy to save water at home. If you save even a few gallons a day you can make a big difference over the long run. The best place to start saving water is in the bathroom. Toilet flushing is the single biggest use of water in the home. Showers and baths are the next biggest use. Follow the tips below to save water at home. Install
answer:
process in water treatment in which small particles are separated from water


question:
The Men in Black are a secret law-enforcement agency that is responsible for policing the extraterrestrial life hidden on Earth, as well as protecting the world from any aliens who attempt to destroy/invade the planet.The film begins on LunarMax, a MiB prison situated on the moon. A one-armed criminal, a Boglodite named Boris the Animal, stages a jailbreak (along the way killing Obadiah Price, a fellow inmate he'd made a deal with). His intention is to rewrite history, with Agent K, the one who arrested and imprisoned him, being a major factor in his plan...On Earth, Agent K and his partner Agent J cover up an arrival of an alien spacecraft, and hear of the prison break. At a Chinese restaurant thats a local haunt for aliens, Agent K discovers Boris (who had previously gone to see Obadiah's son Jeffrey) and the two fight, with J joining in. K is upset that the alien he should have killed is out loose again; he deems it his own affair and forbids J to help him, suspending him. A puzzled J checks up on Boris: he appeared in 1969 to stop the prevention of the ArcNet Shield, a device that K deployed to protect the world from harm (but which killed off the Boglodites, as they can only survive by feeding off worlds). He managed to kill on 15 July 1969 an alien named Roman the Fabulous and on the following day... at this point O cuts him off and tells him not to investigate any further. That night, as K waits for Boris with a gun in his hand, he suddenly vanishes...The next morning, J discovers that he has a new partner, the liberated Agent AA, and that K has been dead for forty years (having been killed by Boris the Animal on 16th July 1969). O notices he is suffering from headaches and craves chocolate milk, which she explains are symptoms of time-fracture (aka the crime of interfering with history, which Obadiah Price was imprisoned for). At this point a Boglodite armada appears; J learns that there was nothing to hold them at bay, with no K to deploy the ArcNet. He theorizes that Boris went back in time to 1969 to kill K, thus changing history to what it was, and proposes to follow him; he heads to Jeffrey Price, who had provided Boris a time-jump device, and gets another one from him, and activates it by jumping off the Chrysler Building just as the Boglodites begin their assault...J arrives in 15 July 1969, with the intention to catch Boris as he is about to murder Roman the Fabulous. However, he is delayed from navigating the era of 1969 (most notably by an altercation with two racist cops), and gets there too late to stop Romans murder by 1969 Boris. He encounters 1969 Agent K, who subdues him and brings him to MiB headquarters. J tells K nothing, but when threatened with getting his memory erased he tells K part of the truth: he came from the future in pursuit of another time-traveler whos trying to change history.K and J follow a trail of clues to Andy Warhols Factory complex, where Warhol is revealed to be MiB Agent W. He notifies them of Griffin, an Arcanian being who has the ability to foresee all timelines and futures; Griffins planet was destroyed by the Boglodites, so he came to live on Earth and brought with him a device which will prevent the Boglodites from consuming the Earth. 1969 Boris arrives at the Factory in search of Griffin, who makes a quick exit with Boris in fast pursuit (to Js displeasure, although K doesnt seem to get too worried).J and K eventually track down Griffin at Shea Stadium, where he is foreseeing the future victory for the Mets baseball team. 1969 Boris appears and captures Griffin, but J and K are able to rescue Griffin, although Boris gets away. Griffin gives them the ArcNet and explains it can only work in zero gravity: K gets the idea to head to Cape Canaveral on 16th July 1969 (the day the Apollo 11 ship launched)
answer:
Who attacks the agents as they climb up the tower?


question:
The movie opens with James Reece (Jonathan Rhys Meyers) driving through the streets of Paris in a black SUV to work. Reece works in the American Embassy as an aide to Ambassador Bennington (Richard Durden), the U.S. Ambassador to France. Taking a delivery of some forms from the Ambassador's secretary, he goes over Bennington's itinerary for the next few days, centering around a major summit in which the U.S., France, and several other nations are preparing foreign aid to the African continent. Bennington shows that he is more absorbed right now in a chess game he's playing with Reece during all this time. Despite paying less attention to the board and the game than Bennington is, Reece quickly checkmates him to win.Reece receives a call from an unknown source (voiced by David Gasman) directing him to a silver BMW in the parking lot, excusing himself with a cover story to Bennington that he has to review the Summit's planned seating arrangement. Going to the parking lot, Reece opens a code-locked security compartment in the trunk of his SUV to reveal a firearm and several French license plates. He removes the license plate from the silver BMW and replaces it with one of the plates he has stowed away in his SUV. He then moves his SUV to another parking space and waits there, watching the silver BMW. He watches several men get into the vehicle, put a briefcase into its trunk, and drive away.Arriving home, Reece gets another call from the same source. Reece is in fact a CIA operative working in the Embassy as a cover. He does minor jobs for his superiors, and is eager to move up into Special Ops. His superior assures him he'll get his chance, but for right now he is needed to secure a hidden transmission chip in the French Foreign Minister's office during a meeting with Ambassador Bennington. Reece doesn't believe he was given a chip, but is told it's in his left jacket pocket. Checking his jacket, he finds the chip there.Sitting in his apartment, Reece examines the chip. He is interrupted by a knock on his door. It's his girlfriend, Caroline (Kasia Smutnak) (pronounced Cah-roll-een, the 'ine' being pronounced like in the word 'magazine'). Caroline kisses Reece and tells him she has a surprise. She sits him in a chair and makes him keep his back to her. He can hear her undressing and changing into a different outfit. When she tells him to look, his jaw drops at the sight of her wearing a sexy strapless dress. He thinks he recognizes the fabric, and Caroline tells him she made it out of their bedroom curtains-- Caroline is a clothing designer. The two of them quickly start to undress as they head into the bedroom to make out.Reece arrives the next day at the conference site to give Bennington a summary of what is intended to be discussed at the meeting. Bennington invites Reece to attend the meeting with him.During the meeting, Reece discreetly takes the chip (disguising it by putting a piece of gum in his mouth and offering another piece to the Minister's secretary) and tries to put it under the lampstand beside his seat, using his chewing gum as an adhesive. However, the gum fails to hold and twice it falls back to the floor in plain sight. Frustrated, and barely managing to keep the chip hidden, as a diversion Reece finally questions the Foreign Minister (Eric Godon) about his having several Goyas in his office. The Minister says he does, and offers to show them to Bennington, who is very interested in Goya art. As Bennington accompanies the Minister and secretary to see the Goyas, leaving Reece alone in the meeting room, Reece takes the stapler from the Minister's desk and staples the chip to the underside of the desk... but accidentally leaves the stapler open as he exits.Arriving home that evening, Reece is disquieted as the lights in the hallway go out. He finds what looks like a trail of blood leading to a door out onto the roof of the building. Grabbing a broom left in
answer:

What are the terrorists targeting?