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.
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Question: Article: Blue whales are the largest animals ever known to have existed on the planet, and they can grow to a length of 100 feet and weigh more than 330,000 pounds. But recently researchers have found that these whales are on the move and they have migrated (moved) from California waters to areas off Canada and Alaska for the first time since commercial whaling ended in 1965. The researchers identified 15 blue whales that have appeared off the coast of British Columbia and the Gulf of Alaska since 1997. Four of these whales were recognized as ones that were once sighted off California shores, suggesting that the whales are returning to an old migration pattern between the coasts. Before commercial whaling began in the early 1900s, blue whales were found widely throughout the North Pacific and California waters. But from the 1920s to the 1960s, whaling severely reduced the whale populations. Blue whales never recovered in the Northern Pacific, making sightings in this area rare. However, much larger groups of whales have been observed close to California since the 1970s. The scientists had previously thought that the California population was separate from the population that had historically lived in North Pacific waters. But the current study shows that whales off the coast of British Columbia and the Gulf of Alaska are likely part of the California population.[:] To identify the blue whales, the researchers looked at photos of _ taken in the North Pacific Ocean and compared them with a library of blue whale pictures taken along the West Coast of the United States and Southern Pacific. Up to now, the researchers are not quite sure why the whales are changing their migration patterns, but they suspect that the whales may be following their food moving farther north by the changes in ocean conditions.
Answer: moving from the south to the north

Answer: According to the passage, blue whales are _ .

Question: Article: Can software bring dead tongues back to life? Probably yes. A computer algorithm works almost as well as a trained linguist in reconstructing how dead " _ " would have sounded, says a new study. "Our computer system is doing a basic job right now," says Alex Bouchard-Cote, an assistant professor in the department of statistics at the University of British Columbia and lead author of the paper describing the algorithm. But the program does a good enough job that it may be able to give linguists a head start, the statistician added. For centuries, scholars have reconstructed languages by hand: looking at the same word in two or more languages and making educated guesses about what that word's "ancestor" may have sounded like. For example, the Spanish word for man ("hombre") and the French word for man ("homme") developed from the Latin word "homo." The way linguists compare words from descendant languages to reconstruct the parent language is called, appropriately, the comparative method. The early 19th-century linguist Franz Bopp was the first to compare Greek, Latin and Sanskrit using this method. Jacob Grimm, one of the Brothers Grimm of fairy tale fame, used the comparative method to show how Germanic languages developed from a common ancestor. The difference between that and Bouchard-Cote's program, the statistician says, "is we do it on a larger scale." As a proof of concept, Bouchard-Cote fed words from 637 Austronesian languages (spoken in Indonesia, the Philippines, Malaysia and more) into the new algorithm, and the system came up with a list of what the ancestor words of all those languages would have sounded like. In more than 85 percent of cases, the automated reconstruction came within one character of the ancestor word commonly accepted as true by linguists. The algorithm won't replace trained human linguists, but could speed up language analysis. Using a computer to do large-scale reconstruction offers another advantage. Bouchard-Cote says, "With big data sets, you can really start finding regularities ... You might find that certain sounds are more likely to change than others." So Bouchard-Cote's team tested the "functional load hypothesis ," which says that sounds that are more important for two clearly different words are less likely to change over time. A formal test of this hypothesis in 1967 looked at four languages; Bouchard-Cote's algorithm looked at 637. "The revealed pattern would not be obvious if we had not been able to reconstruct large numbers of protolanguages," Bouchard-Cote and his coauthors write in the new study. In addition to simply helping linguists understand how people spoke in the past, studying ancient languages can perhaps answer historical questions. For example, Bouchard-Cote says, "Say people are interested in finding out when Europe was settled. If you can figure out if the language of the settling population had a word for wheel, then you can get some idea of the order in which things occurred, because you would have some records that show you when the wheel was invented."
Answer: allow us to find answers to some historical questions

Answer: According to Bouchard-Cote, reconstructing the dead "protolanguages" might _ .

Question: Article: LONDON(Reuters)--Organic fruit, delivered right to the doorstep.That is what Gabriel Gold prefers, and he is willing to pay for it.If this is not possible, the 26-year-old computer technician will spend the extra money at the supermarket to buy organic food. "Organic produce is always better," Gold said."The food is free of pesticides , and you are generally supporting family farms instead of large farms.And more often than not it is locally grown and seasonal, so it is more tasty." Gold is one of a growing number of shoppers buying into _ , and supermarkets across Britain are counting on more like him as they grow their organic food business.But how many shoppers really know what they are getting, and why are they willing to pay a higher price for organic produce? Market research shows that Gold and others who buy organic food can generally give clear reasons for their preferences--but their knowledge of organic food is far from complete.For example, small amounts of pesticides can be used on organic products.And about three quarters of organic food in Britain is not local but imported to meet growing demand."The demand for organic food is increasing by about one third every year, so it is a very fast-growing market," said Sue Flock, a specialist in this line of business.
Answer: they consider the food free of pollution

Answer:
More and more people in Britain are buying organic food because _ .