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.
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Question: Passage: As the 19th century progressed, the United States government's Indian removal policy pushed Native American tribes west of the Mississippi River.  In 1830, the Indian Removal Act was signed into law, and though that act did not directly address the Potawatomi people of Indiana, it led to several additional treaties that resulted in their removal.  In what came to be known as the Potawatomi Trail of Death, about 860 Potawatomi Indians who had refused to leave were forced to move from Indiana to Kansas.  On September 14, 1838, the group camped near Williamsport, and on September 15 they camped in the southwestern part of the county before moving into Illinois.  Before reaching their destination in Kansas, over 40 of them had died, many of them children; two children died and were buried at the second Warren County campsite.When the county was established, the Wabash River was vital to transportation and shipping.  Zachariah Cicott traded up and down the river, and cities like Attica, Perrysville, Baltimore and Williamsport were founded near the river's banks and flourished because of it.  In the 1840s, the Wabash and Erie Canal began to operate and provided even broader shipping opportunities, but the canal favored towns which were on the "right side" of the river; the canal was on the Fountain County side, and towns like Baltimore dwindled as a result.  Some towns, such as Williamsport and Perrysville, managed to participate in canal traffic through the use of side-cuts that brought traffic from the canal across the river.  When railroads were constructed starting in the 1850s, they in turn began to render the canals obsolete and allowed trade to reach towns that lacked water connections.  The canal continued to be used through the early 1870s.

Answer: What decade did the canals that provided broader shipping opportunities start to decline due to railroads?


Question: Passage: The whale ear has specific adaptations to the marine environment. In humans, the middle ear works as an impedance equalizer between the outside air's low impedance and the cochlear fluid's high impedance. In whales, and other marine mammals, there is no great difference between the outer and inner environments. Instead of sound passing through the outer ear to the middle ear, whales receive sound through the throat, from which it passes through a low-impedance fat-filled cavity to the inner ear. The whale ear is acoustically isolated from the skull by air-filled sinus pockets, which allow for greater directional hearing underwater. Odontocetes send out high frequency clicks from an organ known as a melon. This melon consists of fat, and the skull of any such creature containing a melon will have a large depression. The melon size varies between species, the bigger the more dependent they are of it. A beaked whale for example has a small bulge sitting on top of its skull, whereas a sperm whale's head is filled up mainly with the melon.The whale eye is relatively small for its size, yet they do retain a good degree of eyesight. As well as this, the eyes of a whale are placed on the sides of its head, so their vision consists of two fields, rather than a binocular view like humans have. When belugas surface, their lens and cornea correct the nearsightedness that results from the refraction of light; they contain both rod and cone cells, meaning they can see in both dim and bright light, but they have far more rod cells than they do cone cells. Whales do, however, lack short wavelength sensitive visual pigments in their cone cells indicating a more limited capacity for colour vision than most mammals. Most whales have slightly flattened eyeballs, enlarged pupils (which shrink as they surface to prevent damage), slightly flattened corneas and a  tapetum lucidum; these adaptations allow for large amounts of light to pass through the eye and, therefore, a very clear image of the surrounding area. They also have glands on the eyelids and outer corneal layer that act as protection for the cornea.The olfactory lobes are absent in toothed whales, suggesting that they have no sense of smell. Some whales, such as the bowhead whale, possess a vomeronasal organ, which does mean that they can "sniff out" krill.Whales are not thought to have a good sense of taste, as their taste buds are atrophied or missing altogether.  However, some toothed whales have preferences between different kinds of fish, indicating some sort of attachment to taste. The presence of the Jacobson's organ indicates that whales can smell food once inside their mouth, which might be similar to the sensation of taste.

Answer: What is the name of the organ in the mouth of the animals that have slightly flattened eyeballs that allows them to smell in their mouths?


Question: Passage: Ruisdael's work from c. 1646 to the early 1650s, when he was living in Haarlem, is characterised by simple motifs and careful and laborious study of nature: dunes, woods, and atmospheric effects. By applying heavier paint than his predecessors, Ruisdael gave his foliage a rich quality, conveying a sense of sap flowing through branches and leaves. His accurate rendering of trees was unprecedented at the time: the genera of his trees are the first to be unequivocally recognisable by modern-day botanists. His early sketches introduce motifs that would return in all his work: a sense of spaciousness and luminosity, and an airy atmosphere achieved through pointillist-like touches of chalk. Most of his thirty black chalk sketches that survive date from this period.An exemplar of Ruisdael's early style is Dune Landscape, one of the earliest works, dated 1646. It breaks with the classic Dutch tradition of depicting broad views of dunes that include houses and trees flanked by distant vistas. Instead, Ruisdael places tree-covered dunes prominently at centre stage, with a cloudscape concentrating strong light on a sandy path. The resulting heroic effect is enhanced by the large size of the canvas, "so unexpected in the work of an inexperienced painter" according to Irina Sokolova, curator at the Hermitage Museum. The art historian Hofstede de Groot said of Dune Landscape: "It is hardly credible that it should be the work of a boy of seventeen".
Ruisdael's first panoramic landscape, View of Naarden with the Church at Muiderberg in the Distance, dates from 1647. The theme of an overwhelming sky and a distant town, in this case the birthplace of his father, is one he returned to in his later years.For unknown reasons, Ruisdael almost entirely stopped dating his work from 1653. Only five works from the 1660s have a, partially obscured, year next to his signature; none from the 1670s and 1680s have a date. Dating subsequent work has therefore been largely based on detective work and speculation.All thirteen known Ruisdael etchings come from his early period, with the first one dated 1646. It is unknown who taught him the art of etching. No etchings exist signed by his father, his uncle, or his fellow Haarlem landscapist Cornelis Vroom, who influenced his other work. His etchings show little influence from Rembrandt, either in style or technique. Few original impressions exist; five etchings survive in only a single impression. The rarity of prints suggests that Ruisdael considered them trial essays, which did not warrant large editions. The etching expert Georges Duplessis singled out Grainfield at the Edge of a Wood and The Travellers as unrivalled illustrations of Ruisdael's genius.

Answer:
Where was Ruisdael's father born?