instruction:
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.
question:
Passage: Nansen's Fram expedition of 189396 was an attempt by the Norwegian explorer Fridtjof Nansen to reach the geographical North Pole by harnessing the natural eastwest current of the Arctic Ocean. In the face of much discouragement from other polar explorers, Nansen took his ship Fram to the New Siberian Islands in the eastern Arctic Ocean, froze her into the pack ice, and waited for the drift to carry her towards the pole. Impatient with the slow speed and erratic character of the drift, after 18 months Nansen and a chosen companion, Hjalmar Johansen, left the ship with a team of dogs and sledges and made for the pole. They did not reach it, but they achieved a record Farthest North latitude of 8613.6N before a long retreat over ice and water to reach safety in Franz Josef Land. Meanwhile, Fram continued to drift westward, finally emerging in the North Atlantic Ocean.
The idea for the expedition had arisen after items from the American vessel Jeannette, which had sunk off the north coast of Siberia in 1881, were discovered three years later off the south-west coast of Greenland. The wreckage had obviously been carried across the polar ocean, perhaps across the pole itself. Based on this and other debris recovered from the Greenland coast, the meteorologist Henrik Mohn developed a theory of transpolar drift, which led Nansen to believe that a specially designed ship could be frozen in the pack ice and follow the same track as Jeannette wreckage, thus reaching the vicinity of the pole.
Nansen supervised the construction of a vessel with a rounded hull and other features designed to withstand prolonged pressure from ice. The ship was rarely threatened during her long imprisonment, and emerged unscathed after three years. The scientific observations carried out during this period contributed significantly to the new discipline of oceanography, which subsequently became the main focus of Nansen's scientific work. Fram's drift and Nansen's sledge journey proved conclusively that there were no significant land masses between the Eurasian continents and the North Pole, and confirmed the general character of the north polar region as a deep, ice-covered sea. Although Nansen retired from exploration after this expedition, the methods of travel and survival he developed with Johansen influenced all the polar expeditions, north and south, which followed in the subsequent three decades.
Question: What is the precise geographic name of the pole Nansen and Johansen left the ship with a team of dogs and sledges to make for?
answer:
North Pole.

question:
Passage: Two impecunious English sisters, Ellen and Agnes Isit (Dulcie Gray and Margaret Johnston), unexpectedly inherit a Neapolitan villa from a deceased uncle and move to Italy to view and sell their property. A local man, Salvatore, has since a boy been employed by the deceased uncle becoming major domo and he now manages the villa and its vineyard. Exploring her late uncles' studio, Ellen uncovers a painting of a nude Salvatore as Bacchus.
Soon Ellen becomes drawn to the carefree life of the locals and the romantic charisma of Salvatore, while the prudish Agnes resists. During the raucous revelry of the grape-treading festival, Agnes succumbs to her suppressed desire. Rushing to the balcony she cries out for Salvatore who drops Ellen and climbs from the grape vat and to her bed. The pair are quickly married, and husband Salvatore now is master of the estate.
Soon, Ellen becomes aware of a change in Salvatore's behaviour towards Agnes. Not long after the marriage, Agnes' health begins to deteriorate and Ellen's suspicions are aroused. She expresses her concerns to a visiting English doctor, Benjamin Dench who is Agnes's former fiance'. Ellen is convinced that Agnes is being poisoned. She enlists Dench's help in trying to prove that Salvatore is slowly murdering her sister with arsenic. The villa once belonged to Salvatore's family and he has long been determined to regain ownership. Having poisoned his employer to inherit he had not anticipated the sisters arrival on the scene.
Question: What is the name of the person Salvatore may be poisoning with arsenic?
answer:
Agnes Isit.

question:
Passage: The seabed contains enormous reserves of minerals which can be exploited by dredging. This has advantages over land-based mining in that equipment can be built at specialised shipyards and infrastructure costs are lower. Disadvantages include problems caused by waves and tides, the tendency for excavations to silt up and the washing away of spoil heaps. There is a risk of coastal erosion and environmental damage.
Seafloor massive sulphide deposits are potential sources of silver, gold, copper, lead and zinc and trace metals since their discovery in the 1960s. They form when geothermally heated water is emitted from deep sea hydrothermal vents known as "black smokers". The ores are of high quality but prohibitively costly to extract. Small scale mining of the deep sea floor is being developed off the coast of Papua New Guinea using robotic techniques, but the obstacles are formidable.There are large deposits of petroleum, as oil and natural gas, in rocks beneath the seabed. Offshore platforms and drilling rigs extract the oil or gas and store it for transport to land. Offshore oil and gas production can be difficult due to the remote, harsh environment. Drilling for oil in the sea has environmental impacts. Animals may be disorientated by seismic waves used to locate deposits, probably causing the beaching of whales. Toxic substances such as mercury, lead and arsenic may be released. The infrastructure may cause damage, and oil may be spilt.Large quantities of methane clathrate exist on the seabed and in ocean sediment at a temperature of around 2 C (36 F) and these are of interest as a potential energy source. Some estimates put the amount available at between one and 5 million cubic kilometres (0.24 to 1.2 million cubic miles). Also on the seabed are manganese nodules formed of layers of iron, manganese and other hydroxides around a core. In the Pacific these may cover up to 30 percent of the deep ocean floor. The minerals precipitate from seawater and grow very slowly. Their commercial extraction for nickel was investigated in the 1970s but abandoned in favour of more convenient sources. In suitable locations, diamonds are gathered from the seafloor using suction hoses to bring gravel ashore. In deeper waters, mobile seafloor crawlers are used and the deposits are pumped to a vessel above. In Namibia, more diamonds are now collected from marine sources than by conventional methods on land.
Question: What forms when geothermally heated water is emitted from deep sea hydrothermal vents?
answer:
Seafloor massive sulphide deposits.