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.

Input: Consider Input: Context: The movie is based on the true story of two British athletes competing in the 1924 Summer Olympics in Paris. Englishman Harold Abrahams (Ben Cross), who is Jewish, overcomes anti-Semitism and class prejudice in order to compete against the "Flying Scotsman", Eric Liddell (Ian Charleson), in the 100 metre race.Opening in 1919 England, Harold Abrahams enters Cambridge University, where he meets with anti-Semitism from the staff, but enjoys participating in the Gilbert and Sullivan theatre club. He becomes the first person to ever complete the Trinity Great Court run: running around the court in the time it takes for the clock to strike 12. Abrahams achieves an undefeated string of victories in various national running competitions. Although focused on his running, he falls in love with a famous Gilbert and Sullivan soprano, Sybil (Alice Krige).Meanwhile in Scotland, Eric Liddell (Ian Charleson), born in China of Scottish missionary parents, is in Scotland. His devout sister Jennie (Cheryl Campbell) disapproves of Liddell's plans to pursue competitive running. But Liddell sees running as a way of glorifying God before returning to China to work as a missionary.Abrahams and Liddell meet for the first time in London in June 1923 when they first race against each other in a British open. Liddell beats Abrahams who takes it extremely badly. But Sam Mussabini (Ian Holm), a professional trainer whom Abrahams had approached earlier, offers to take him on to improve his technique. This attracts criticism from the Cambridge college masters (John Gielgud and Lindsay Anderson). In their meeting with Abrahams, the Cambridge masters allege it is ungentlemanly for an amateur to "play the tradesman" by employing a professional coach. Abrahams realizes this is a cover for their anti-Semitism and class entitlement, and dismisses their concern.Meanwhile, when Liddell accidentally misses a church prayer meeting because of his running, his sister Jennie upbraids him and accuses him of no longer caring about God. But Eric tells her that though he intends to eventually return to the China mission, he feels divinely inspired when running, and that not to run would be to dishonor God: "I believe that God made me for a purpose. But He also made me fast, and when I run, I feel His pleasure."The two athletes, after over a year of training and racing, are accepted to represent Great Britain in the 1924 Summer Olympics in Paris, France. Also accepted are Abrahams' Cambridge buddies, Lord Andrew Lindsay (Nigel Havers), Aubrey Montague (Nicholas Farrell), and Henry Stallard (Daniel Gerroll) whom join the UK team.While boarding the boat to Paris for the Olympics, Liddell learns from the newspapers that the event for his 100 meter race will be on a Sunday. Liddell refuses to run the race despite strong pressure from the Prince of Wales (David Yelland) as well as the head of the British Olympic committee, Lord Cadogan (Patrick Magee) because Liddell's Christian convictions prevent him from running on the Christian Sabbath (Sunday).Hope appears in the form of Liddell's teammate Lord Andrew Lindsay. Having already won a silver medal in the 400 meter hurdles, Lindsay proposes to yield his place in the 400 meter race on the following Tuesday to Liddell. Liddell gratefully agrees. His religious convictions in the face of national athletic pride make headlines around the world.Liddell delivers a sermon at the Paris Church of Scotland that Sunday, and quotes from Isaiah 40, verse 31:"But they that wait upon the LORD shall renew their strength; they shall mount up with wings as eagles; they shall run, and be not weary; and they shall walk, and not faint."Meanwhile, Abrahams is badly beaten by the heavily favored and more experienced United States runner Charles Paddock (Dennis Christopher) in the 200 meter race who wins the gold medal, while Abrahams takes a second place silver medal. Abrahams knows that his last chance for a gold medal will be the 100 meter run. He competes in the 100 meter sprint and wins, beating Paddock and the rest of the Americans.On Tuesday, just before Liddell's race, the American coach remarks to his runners that Liddell has little chance
Question: When does the 400-metre race take place?

Output: on a tuesday

Input: Consider Input: Context: Comet ISON, formally known as C/2012 S1, was a sungrazing comet discovered on 21 September 2012 by Vitali Nevski ( , Vitebsk, Belarus) and Artyom Novichonok ( , Kondopoga, Russia).
Question: By whom was Comet ISON discovered?

Output: artyom novichonok

Input: Consider Input: 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
Output: agriculture