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 Input:
Passage: The first eruptions of Nevado del Ruiz occurred about 1.8 million years ago at the beginning of the Pleistocene epoch. Three primary eruption periods in the history of the massif have been identified: ancestral, older and present. During the ancestral period between one million to two million years ago, a complex of large stratovolcanoes was created. Between 1.0 million and 0.8 million years ago, they partially collapsed, forming large (5–10 km wide) calderas. During the older period, which lasted from 0.8 million to 0.2 million years ago, a new complex of large stratovolcanoes developed (including Older Ruiz, Tolima, Quindio, and Santa Isabel). Once again explosive summit calderas formed from 0.2 million to 0.15 million years ago.The present period began about 150,000 years ago and involved the development of the present volcanic edifice through the emplacement of lava domes made of andesite and dacite (igneous rocks) inside older calderas. During the past 11,000 years, Nevado del Ruiz passed through at least 12 eruption stages, which included multiple slope failures (rock avalanches), pyroclastic flows and lahars leading to partial destruction of the summit domes. During the past several thousand years, eruptions of the volcanoes in the Ruiz–Tolima massif have mostly been small, and the pyroclastic flow deposits have been much less voluminous than during the Pleistocene. Since the volcano's earlier eruptions are not recorded, volcanologists have used tephrochronology to date them.During recorded history, eruptions have consisted primarily of a central vent eruption (in the caldera) followed by an explosive eruption, then lahars. Ruiz's earliest identified Holocene eruption was about 6660 BC, and further eruptions occurred in 1245 BC ± 150 years (dated through radiocarbon dating), about 850 BC, 200 BC ± 100 years, 350 AD ± 300 years, 675 AD ± 50 years, in 1350, 1541 (perhaps), 1570, 1595, 1623, 1805, 1826, 1828 (perhaps),[b] 1829, 1831, 1833 (perhaps),[b] 1845, 1916, December 1984 – March 1985, September 1985 – July 1991, and possibly in April 1994.[b] Many of these eruptions involved a central vent eruption, a flank vent eruption, and a phreatic (steam) explosion. Ruiz is the second-most active volcano in Colombia after Galeras.

Ex Output:
What partially collapsed, forming large (5–10 km wide) calderas?


Ex Input:
Passage: With MacCallum's year of financial support over, Thomson's financial future became uncertain. He briefly looked into applying for a position as a park ranger, but balked after seeing that it could take months for the application to go through. Instead, he considered working in an engraving shop over the winter. He made little effort to sell his paintings, preferring to give them away, though he brought in some money from the paintings he sold. In mid-November, he donated In Algonquin Park to an exhibition organized to raise money for the Canadian Patriotic Fund. It was sold to Marion Long for $50 (equivalent to CAD$1,100 in 2018).In the spring of 1915, Thomson returned to Algonquin Park earlier than he had in any previous year and had already painted twenty-eight sketches by April 22. From April through July, he spent much of his time fishing, assisting groups on several different lakes, and sketching when he had time. In July, he was invited to send paintings to the Nova Scotia Provincial Exhibition in September. Because he was in Algonquin Park, his friends selected three works to send—two unidentified works from 1914 and the sketch Canadian Wildflowers. From the end of September to mid-October, he spent his time at Mowat, a village on the north end of Canoe Lake. By November, he was at Round Lake with Tom Wattie and Dr. Robert McComb. In late November, he returned to Toronto and moved into a shack behind the Studio Building that Harris and MacCallum fixed up for him, renting it for $1 a month.In 1915, MacCallum commissioned MacDonald, Lismer and Thomson to paint decorative panels for his cottage on Go-Home Bay. In October of that year, MacDonald went up to take dimensions. Thomson produced four panels which were probably meant to go over the windows. In April 1916, when MacDonald and Lismer went to install them, they found that MacDonald's measurements were incorrect and the panels did not fit.

Ex Output:
What is the name of the person who made little effort in selling his paintings?


Ex Input:
Passage: On the inaccessible island of Soay are sheep of a unique type, which lived as feral animals and belonged to the owner of the islands, not to the islanders.  These Soay sheep are believed to be remnants of the earliest sheep kept in Europe in the Neolithic Era, and are small, short-tailed, usually brown with white bellies, and have naturally moulting fleeces.  About 200 Soay sheep remain on Soay itself, and soon after the evacuation a second feral population of them was established on Hirta, which at that time had no sheep; these now number between 600 and 1,700. A few Soays have been exported to form breeding populations in other parts of the world, where they are valued for their hardiness, small size and unusual appearance. On Hirta and Soay, the sheep prefer the Plantago pastures, which grow well in locations exposed to sea spray and include red fescue (Festuca rubra), sea plantain (Plantago maritima) and sea pink (Armeria maritima).The St Kildans kept up to 2,000 of a different type of sheep on the islands of Hirta and Boreray.  These were a Hebridean variety of the Scottish Dunface, a primitive sheep probably similar to those kept throughout Britain during the Iron Age.  At the time of the evacuation all the islanders' sheep were removed from Hirta, but those on Boreray were left to become feral, and these are now regarded as a breed in their own right, the Boreray.  The Boreray is one of the rarest British sheep, and is one of the few remaining descendants of the Dunface (although some Scottish Blackface blood was introduced in the nineteenth century).

Ex Output:
What is the type of sheep that was left during evacuations by the people who had up to 2,000 different types of sheep?