In this task, you're expected to write answers to questions involving multiple references to the same entity. The answer to the question should be unambiguous and a phrase in the paragraph. Most questions can have only one correct answer.

Passage: Shackleton's first task, on arriving at the Stromness station, was to arrange for his three companions at Peggoty Camp to be picked up. A whaler was sent round the coast, with Worsley aboard to show the way, and by the evening of 21 May all six of the James Caird party were safe.It took four attempts before Shackleton was able to return to Elephant Island to rescue the party stranded there. He first left South Georgia a mere three days after he had arrived in Stromness, after securing the use of a large whaler, The Southern Sky, which was laid up in Husvik Harbour. Shackleton assembled a volunteer crew, which had it ready to sail by the morning of 22 May. As the vessel approached Elephant Island they saw that an impenetrable barrier of pack ice had formed, some 70 miles (110 km) from their destination. The Southern Sky was not built for ice breaking, and retreated to Port Stanley in the Falkland Islands.On reaching Port Stanley, Shackleton informed London by cable of his whereabouts, and requested that a suitable vessel be sent south for the rescue operation. He was informed by the Admiralty that nothing was available before October, which in his view was too late. Then, with the help of the British Minister in Montevideo, Shackleton obtained from the Uruguayan government the loan of a tough trawler, Instituto de Pesca No. 1, which started south on 10 June. Again the pack thwarted them. In search of another ship, Shackleton, Worsley and Crean travelled to Punta Arenas, where they met Allan MacDonald, the British owner of the schooner Emma. McDonald equipped this vessel for a further rescue attempt, which left on 12 July, but with the same negative result—the pack defeated them yet again. Shackleton later named a glacier after McDonald on the Brunt Ice Shelf in the Weddell Sea. After problems arose in identifying this glacier, a nearby ice rise was renamed the McDonald Ice Rumples.By now it was mid-August, more than three months since Shackleton had left Elephant Island. Shackleton begged the Chilean Government to lend him Yelcho, a small steam tug that had assisted Emma during the previous attempt. They agreed; on 25 August, Yelcho—captained by Luis Pardo–set out for Elephant Island. This time, as Shackleton records, providence favoured them. The seas were open, and the ship was able to approach close to the island, in thick fog. At 11:40 a.m. on 30 August, the fog lifted, the camp was spotted and, within an hour, all the Elephant Island party were safely aboard, bound for Punta Arenas. 
Question: What vessel did MacDonald equip for a further rescue attempt?
Emma.

Passage: The crew of a malfunctioning alien cargo ship make an emergency landing on Earth. This draws the attention of four sexually-frustrated humans in a nearby park: Oliver and Prudence (a mild-mannered professional and his highly-strung fiancée), Willy (a bumbling shop assistant) and Cliff (a middle-aged man).
Oliver, Prudence, Willy and Cliff wander into the ship and encounter three aliens resembling human women: engineer Partha, nurse Cosia and the captain, known only as Skipper. Willy inadvertently drops some pornographic magazines that he has recently bought. The aliens mistake some approaching cows for a hostile force and hurriedly take off, despite warnings from the long-suffering computer about the precarious state of the ship's systems. Resuming their original course, they study their guests in detail. Fascinated by the anatomy of the males, they decide to sell them to a zoo for exotic lifeforms on a distant planet. They also debate the significance of the acts depicted in Willy's magazines. Partha is particularly keen to emulate them and enthusiastically has sex with Cliff.
Skipper, Cosia and Partha subject the males to a series of tests to learn more about their abilities. Oliver and Cliff fail miserably. However, Willy, looking for his magazines, beats Skipper's combat simulation by unknowingly evading her attacks, causing her to collapse with exhaustion and infer that he is a stronger being. While conducting a physical examination on Willy, Cosia discovers that his biology is more advanced than anything known to their species; encouraging Cosia with exaggerated claims about his sexual prowess, Willy loses his virginity to her. Later, he passes an intelligence test by a fluke and has sex with Partha. 
Question: Who decides to sell people to a zoo for exotic lifeforms on a distant planet?
Skipper.

Passage: In the years following the Ancestral Puebloan's departure from Chaco Canyon, several migrations to the region occurred. During the 15th century, Navajo people emigrated to the area from northwestern Canada, and in the 18th century Spanish explorers and settlers came from the south. The Spanish investigated parts of the San Juan Basin, but there is no record of them ever finding Chaco Canyon. When cartographer Bernardo de Miera y Pacheco drew a map in 1774 of Spanish land holdings in the region, he labeled Chaco Canyon with the word Chaca, but it is unlikely he ever visited the area. In 1823 the governor of New Mexico, José Antonio Vizcarra, discovered ancient ruins in the canyon during a military campaign against the Navajo. Vizcarra's account is the first historical record of the Chacoan great houses that were "of such antiquity that their inhabitants were not known to Europeans". In 1844, Josiah Gregg made the first published reference to Chaco Canyon in his popular book, Commerce of the Prairies.
The United States started exploring the region following the Mexican–American War of 1846–48 and the acquisition of the New Mexico Territory. During a military campaign against the Navajo in 1849, Lieutenant James Simpson of the United States Army Corps of Engineers became interested in the canyon's ruins. A group led by the governor of Jemez Pueblo, Francisco Hosta, explored the canyon; its members included Simpson and the brothers Richard and Edward Kern, who were respectively an artist and a cartographer. Simpson was impressed by Chetro Ketl's masonry, which he described as "a combination of science and art which can only be referred to a higher stage of civilization and refinement than is discoverable in the works of Mexicans or Pueblos of the present day." Simpson and company documented their findings, noting the location and style of the great houses, taking measurements, and sketching the canyon's major ruins. They described the kivas as "circular apartments sunk in the ground". Simpson briefly explored Chetro Ketl, documenting six of its round rooms and 124 rooms on the ground floor of the four-story building. He noted an especially well preserved room where "the stone walls still have their plaster upon them in a tolerable state of preservation." Vivian credits Simpson's 1850 report detailing their brief exploration of the canyon and Richard H. Kern's lithographs as the beginning of Chacoan archeology. The scientific investigation of Chaco Canyon started when Richard Wetherill began his exploration of the canyon in 1895. Wetherill was well known for his discovery of some of the largest Ancestral Puebloan dwellings in Mesa Verde, and after an invitation from amateur archeologist Sidney Palmer to survey Chaco Canyon, organized a one-month expedition to the region. He secured financial backing for a full season soon afterward, and in 1896 full-scale excavations began at Pueblo Bonito. 
Question: What is the last name of the explorer who found an especially well preserved room in Chetro Ketl?

Simpson.