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: Saturday, October 8, 120 miles northeast of Blainsworth, Nebraska; 1:16 p.m.Bob Irisin, a metrologist for the Kansas City weather bureau, is riding in his Bronco truck when he stops and radios to his friend Stan in Kansas City, that he is witnessing a sudden change in weather patterns in the area. Then a tornado suddenly touches down near a farm where Bob sees a family of a man, woman and their little girl standing in front of the house, unaware of the tornado approaching behind them. Bob drives as near as he can go and manages to yell out a warning to the family seconds before they see the twister coming. The family runs into their storm shelter just in time before the twister destroys their house. Bob drives away from harms way just in time.Meanwhile, in Blainsworth, there is the annual fall Bike-a-thon race for the high school kids. 13-year-old Dan Hatch gets a flat tire and doesnt come in at all. Dans stern father, Jack, is arguing with a banker who's asking to foreclose on his hardware shop since a new mall has opened in the nearby town. Jack refuses to sell the shop at any price. Dan walks his bike into the town square where his best friend, Arthur, talks with him about getting "crashed and burned" during the race. Jack walks over and becomes hard on Dan for not finishing the race like a man should. Dan yells at his father for being so demanding and that he can't expect anything from anyone. Dan's mother, Laura, with her new baby Ryan and her friend Jenny, walk by and never less tell him he did okay anyway. Just then, Dan is called to the square podium for he is has been chosen by a lottery to be the winner of a new Schwinn Voyager bicycle, much to his father and mother's delight.75 miles northeast of Blainsworth; 3:37 p.m. Bob sits in his Bronco truck and radios in of rogue weather patterns, while observing another tornado rip through a nearby trailer park. Bob tells Stan that the front is moving south instead of north and the atmospheric activity is the most bizarre he has ever seen. Bob decides to travel to Blainsworth to see if anything will happen.Outside of Blainsworth, Dan and Arthur sit in the woods looking up at the clear sky. Dan tell Arthur about his fathers demanding which is a driving force that he cant stand. Then Arthur's two younger sisters, Stacey and Ronnie Vae, appear and want Arthur to come home since their parents are out of town for the weekend. Arthur and Dan watch as clouds begin to roll in and they decide to get indoors. At Arthurs house, the boys play a game of pool, in which Dan forgets he's suppose to take his grandmother's dog for a walk.Six miles northeast of Blainsworth 4:30 p.m.; Dan arrives at his grandmother Goldie's house where his father is already there taking her dog to the vet, for it has a bad leg. Jack yells at Dan for not being responsible for anything, and Dan rides on his new bike home.Arthur arrives at the Hatch house, were Laura is getting ready to leave for work for the evening. Jenny arrives at the house to pick Laura up, were they talk about Jack being so domineering on Dan for he doesn't want Dan to end up a loser like him.Nightfall. Arthur and Dan play with musical instruments, while checking every few minutes if baby Ryan in the next room is all right. Jack then arrives and tells Dan and Arthur to bring their bicycles in for its raining. Going out, they find that its raining hard and the winds are picking up speed. Arthur tells Dan that since hes originally from Los Angeles, he enjoys the rain, while Dan sees little amusement in it, for he tells Arthur that rain and hailstorms can get bad.At the local diner in town, Laura is waitressing when Bob walks in asking for some coffee. Bob overhears a farmer named Gus talk about the storm and of tornados reported in the area. Bob tells Gus that most people killed by tornados 
 Question: Who is Danny infatuated with?

SOLUTION: arthur's sister stacey

PROBLEM: Context: The Narym River is a river in the Eastern Kazakhstan, a tributary of the Irtysh River, originating at the junction of the ridges Narym and Sarymsakty of wetland formed by the mountain runoff streams. 
 Question: The body of water that Narym River is near is what?

SOLUTION: irtysh river

PROBLEM: Context: Pollution that enters water at just one point is called point source pollution. For example, chemicals from a factory might empty into a stream through a pipe or set of pipes (see Figure 21.9). Pollution that enters in many places is called non-point source pollution. This means that the pollution is from multiple sources. With non-point source pollution, runoff may carry the pollution into a body of water. Which type of pollution do you think is harder to control? There are three main sources of water pollution: 1. Agriculture. 2. Industry. 3. Municipal, or community, sources. Huge amounts of chemicals, such as fertilizers and pesticides, are applied to farm fields (see Figure 21.10). Some of the chemicals are picked up by rainwater. Runoff then carries the chemicals to nearby rivers or lakes. Dissolved fertilizer causes too much growth of water plants and algae. This can lead to dead zones where nothing can live in lakes and at the mouths of rivers. Some of the chemicals can infiltrate into groundwater. The contaminated water comes up in water wells. If people drink the polluted water, they may get sick. Waste from livestock can also pollute water. The waste contains bacteria and other organisms that cause disease. In fact, more than 40 human diseases can be caused by water polluted with animal waste. Many farms in the U.S. have thousands of animals. These farms produce millions of gallons of waste. The waste is stored in huge lagoons, like the one in Figure 21.11. Unfortunately, many leaks from these lagoons have occurred. Two examples are described below. In North Carolina, 25 million gallons of hog manure spilled into a nearby river. The contaminated water killed Factories and power plants may pollute water with harmful substances. Many industries produce toxic chemicals. Some of the worst are arsenic, lead, and mercury. Nuclear power plants produce radioactive chemicals. They cause cancer and other serious health problems. Oil tanks and pipelines can leak. Leaks may not be noticed until a lot of oil has soaked into the ground. The oil may pollute groundwater so it is no longer fit to drink. Municipal refers to the community. Households and businesses in a community are also responsible for polluting the water supply. For example: People apply chemicals to their lawns. The chemicals may be picked up by rainwater. The contaminated runoff enters storm sewers and ends up in nearby rivers or lakes. Underground septic tanks can develop leaks. This lets household sewage seep into groundwater. Municipal sewage treatment plants dump treated wastewater into rivers or lakes. Sometimes the wastewater is not treated enough and contains bacteria or toxic chemicals. The oceans are vast. You might think they are too big to be harmed by pollution. But thats not the case. Ocean water is becoming seriously polluted. The oceans are most polluted along coasts. Why do you think thats the case? Of course, its because most pollution enters the oceans from the land. Runoff and rivers carry the majority of pollution into the ocean. Many cities dump their wastewater directly into coastal waters. In some parts of the world, raw sewage and trash may be thrown into the water (see Figure 21.12). Coastal water may become so polluted that people get sick if they swim in it or eat seafood from it. The polluted water may also kill fish and other ocean life. Oil spills are another source of ocean pollution. To get at oil buried beneath the seafloor, oil rigs are built in the oceans. These rigs pump oil from beneath the ocean floor. Huge ocean tankers carry oil around the world. If something goes wrong with a rig on a tanker, millions of barrels of oil may end up in the water. The oil may coat and kill ocean animals. Some of the oil will wash ashore. This oil may destroy coastal wetlands and ruin beaches. Figure 21.13 shows an oil spill on a beach. The oil washed ashore after a deadly oil rig explosion in the Gulf of Mexico in 2010. Thermal pollution is pollution that raises the temperature of water. This is caused by power plants and factories that 
 Question: major cause of water pollution

SOLUTION:
agriculture