In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

[EX Q]: Passage: Willow has been cut and used on the Levels since mankind moved into the area. Fragments of willow basket were found near the Glastonbury Lake Village, and it was used in the construction of several Iron Age causeways. The willow was harvested using traditional methods of pollarding, where a tree would be cut back to the main stem. New shoots of willow, called "withies", would grow out of the trunk and these would be cut periodically for use.During the 1930s, over 9,000 acres (36 km2) of willow were being grown commercially on the Levels. Largely because of the replacement of baskets by plastic bags and cardboard boxes, the industry has severely declined since the 1950s. By the end of the 20th century only about 350 acres (1.4 km2) were grown commercially, near the villages of Burrowbridge, Westonzoyland, and North Curry. The Somerset Levels is now the only area in the UK where basket willow is grown commercially. For weaving, the species Salix triandra (almond willow, black maul) is grown, while Salix viminalis (common osier) is ideal for handles, bases, and the structural members in furniture and hurdles. Historically willow was used to make salmon traps or "putchers". Products including baskets, eel traps (kypes), lobster pots, and furniture were widely made from willow throughout the area in the recent past. Among the more unusual products still made are passenger baskets for hot air balloons, the frames inside the Bearskins worn by the regiments of the Grenadier Guards, and an increasing number of willow coffins.Another use of willow has been found by the Coate family, who make artists' charcoals in Stoke St Gregory. It has become in 30 years the leading artists' charcoal manufacturer in Europe, producing most of the natural charcoals sold under different art-material brands.The industry is celebrated in the form of the Willow Man (sometimes known as the Angel of the South), a willow sculpture, 40 feet (12.2 m) tall, produced by artist Serena de la Hey in September 2000 that can be seen from the railway and the M5 motorway to the north of Bridgwater. At Stoke St Gregory there is also a Willows and Wetlands Visitor Centre.
[EX A]: What is the name of the family that is the leading artists' charcoal manufacturer in Europe?

[EX Q]: Passage: In December 1775, Cletus Moyer is a free black Northerner in colonial America, working with a pre-Underground Railroad network to help slaves escape captivity. In the days just prior to Christmas, a group of bounty hunters led by Hattie Carraway captures Moyer near the Parker plantation in Spotsylvania County, Virginia. Because of his capture, dozens of slaves who have already left their plantations in escape attempts are in danger of being captured as well. Moyer implores two slaves from the nearby Reynolds plantation to take his place: Kunta Kinte, a Mandinka in his mid-twenties who was captured in what is now the Gambia, and Fiddler, an elderly man who was born into slavery. Kunta is eager to help (and to escape himself), but Fiddler is unwilling, fearful of the consequences if they are caught.
After an unsuccessful slave revolt elsewhere in the colony, Moyer and two slaves are hanged by Carraway's men on Christmas Eve, prompting Fiddler to set aside his fear and help Kunta lead the runaway slaves to freedom. Although the pair successfully leads the runaways that night to their next stop on the escape route (a boat waiting at the river) there is only room for one of them, and since neither one wants to go without the other, they both decide to stay.  That choice forces them to return to the Parker plantation and manufacture an excuse for their temporary absence. Nevertheless, Kunta and Fiddler are left with the satisfaction of knowing that they helped to give a group of fellow slaves the best Christmas gift of all: freedom.
[EX A]: What's the first name of the person who dies the day before Christmas?

[EX Q]: Passage: Libby's original exchange reservoir hypothesis assumed that the 14C/12C ratio in the exchange reservoir is constant all over the world, but it has since been discovered that there are several causes of variation in the ratio across the reservoir.Marine effect
The CO2 in the atmosphere transfers to the ocean by dissolving in the surface water as carbonate and bicarbonate ions; at the same time the carbonate ions in the water are returning to the air as CO2. This exchange process brings14C from the atmosphere into the surface waters of the ocean, but the 14C thus introduced takes a long time to percolate through the entire volume of the ocean. The deepest parts of the ocean mix very slowly with the surface waters, and the mixing is uneven. The main mechanism that brings deep water to the surface is upwelling, which is more common in regions closer to the equator. Upwelling is also influenced by factors such as the topography of the local ocean bottom and coastlines, the climate, and wind patterns. Overall, the mixing of deep and surface waters takes far longer than the mixing of atmospheric CO2 with the surface waters, and as a result water from some deep ocean areas has an apparent radiocarbon age of several thousand years. Upwelling mixes this "old" water with the surface water, giving the surface water an apparent age of about several hundred years (after correcting for fractionation). This effect is not uniform – the average effect is about 400 years, but there are local deviations of several hundred years for areas that are geographically close to each other. These deviations can be accounted for in calibration, and users of software such as CALIB can provide as an input the appropriate correction for the location of their samples.  The effect also applies to marine organisms such as shells, and marine mammals such as whales and seals, which have radiocarbon ages that appear to be hundreds of years old.Hemisphere effect
The northern and southern hemispheres have atmospheric circulation systems that are sufficiently independent of each other that there is a noticeable time lag in mixing between the two. The atmospheric 14C/12C ratio is lower in the southern hemisphere, with an apparent additional age of about 40 years for radiocarbon results from the south as compared to the north. This is because the greater surface area of ocean in the southern hemisphere means that there is more carbon exchanged between the ocean and the atmosphere than in the north. Since the surface ocean is depleted in 14C because of the marine effect, 14C is removed from the southern atmosphere more quickly than in the north.  The effect is strengthened by strong upwelling around Antarctica.Other effects.
[EX A]:
What is the name of the software that can provide as an input the appropriate correction for the location of their samples?