In this task, you're given an article and an answer. Your task is to generate the fill-in-the-blank question for this answer based on the given article. The blanks are always at the end of the question, and can be filled with more than one word or phrase.

Ex Input:
Article: This is a dangerous world we live in.The number of murders goes up every year, people are dying of cancer, more people contract HIV, more teens are using drugs, etc.You know this because you have heard all the statistics on the news and in the paper. But do you really have an accurate idea what they mean? The numbers are growing up, but how do they compare to the growth in population? Are more cases of these diseases being reported because of better testing techniques, or are the diseases more common? The fact is that without knowing the background statistics mean very little. This growing trend of reporting only part of the information is becoming dangerous.For example, several years ago a high school student reported the dangers of the chemical known as dihydrogen monoxide.This chemical, found in most cancerous tumors , is often found in the blood of people drunk on alcohol, and causes complete physical and mental dependence for those who take the chemical even once.After reading his report, more than 75% of his Advanced Placement Chemistry class voted to forbid this dangerous chemical! Every one of the above statements is true, yet this chemical is necessary to all life on earth.The students made the mistake because they voted knowing only a few statements and statistics, rather than the chemical's full background. The point of this article is that one should be aware of what is and is not being said.When one finds a new fact or number, one should try to consider other important information before forming an opinion with only half-truths.Always remember that the author is trying to convince you of his or her own view, and will leave out information that is different to his view.For example, look again at the statistics that suggest skiing is safe.Only 32 people may die each year when skiing, while 897 die from lightning strikes, but which is really the most dangerous? If you think about it, you realize far fewer people go skiing each year than the number of people who are in danger of a lightning strike.When you think about it, skiing is more dangerous than you might at first think when looking at statistics.If we teenagers are to be left in this world, we had better be able to think critically, and form our own views, rather than be easily persuaded by another's.To be warned is to be prepared.
Answer: readers are not able to analyze so much information at once.

Ex Output:
Relative information is often left out because _ .

Ex Input:
Article: . As the world's largest terrestrial carnivore ,the polar bear is the king of the great white north. Adult males can measure more than 9 feet in length and weigh between 770 and 1,430 pounds. The bear's body and neck are elongated, and the head is narrow and long with small, rounded ears. Polar bear populations can be found in northern Canada, Greenland, Norway and Russia, and there have been reports that polar bear tracks have been found as far north as the North Pole. The 5,000,000-square-mile range of the polar bear circles the Arctic and contains stretches of open water where seals are easily caught. Polar bears live on the annual Arctic sea ice that provides a platform from which they can hunt. They hunt seals on the sea ice by breaking into seal dens in the sea ice. The dens aren't visible from above,but seeing is less important than smelling to a polar bear -- with their keen sense of smell,polar bears can sense the breathing holes of seals in their dens beneath the snow and ice. As the southern edge of the Arctic ice cap melts in summer, polar bears are stranded on land and spend their summers fasting ,living off body fat stored from hunting in spring and winter. It might come as a surprise that this species faces an uncertain future. Climate change is causing the disappearance of sea ice from which polar bears hunt seals. Sea ice in the Arctic is melting earlier and forming later each year. With about 22,000 polar bears living in the wild,the species is not endangered at the moment, but its future is far from certain. People have reached an agreement that controls the hunting of polar bears and directs each nation to protect their habitats, but it does not protect the bears against the biggest man-made threat to their survival : global warming. If current warming trends continue, scientists believe that polar bears may disappear within 100 years.
Answer: necks

Ex Output:
Polar bears search for seals mainly through their _ .

Ex Input:
Article: The engineer Camillo Olivetti was 40 years old when he started the company in 1908. At his factory in Ivera, he designed and produced the first Italian typewriter. Today the company's head office is still in Ivrea, near Turin, but the company is much larger than it was in those days and there are offices all around the world. By 1930 there was a staff of 700 and the company turned out 13,000 machines a year. Some went to customers in Italy, but Olivetti exported more typewriters to other countries. Camilllo's son, Adriano, started working for the company in 1924 and later he became the boss. He introduecd a standard speed for the production line and he employed technology and design specialists. The company developed new and better typewriters and the calculators .In 1959 it produced the ELLA computer system. This was the first mainframe computer designed and traded in Italy. After Adriano died in 1960, the company had a period of financial problems. Other companies, especially the Janpanese, made faster progress in electronic technology than the Italian company. In 1978, Carlo de Benedetti became the new boss. Olivetti increased its marking and service networks and made agreements with other companies to design and produce more advanced office equipment. Soon it became one, of the world's leading companies in information technology and communications. There are now five independent companies in the Olivetti group --- one for personal computers,one for other office equipment, one for systerms and services, and two for telecommunications.
Answer: by 1930 Olivetti produced 13,000 typewriters a year

Ex Output:
From the text we learn that _ .