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.

Input: Consider Input: Passage: The saddest sight was seeing people behind the wire fences on both sides of the land frontier yelling at the top of their voices across the wide dividing space to enquire about the state of relatives, as telephone communications had been cut by the Spaniards. Local housewives with Spanish relatives in the Campo area kept their radios tuned to the nearby Spanish stations for news of family members who were gravely ill. In critical cases the parties concerned would rush to Spain via Tangiers but unfortunately sometimes the patient was dead and buried by the time they arrived. The Spanish authorities would not allow access across the land frontier even on compassionate grounds.
Franco's death in 1975 led to the beginnings of diplomatic movement between Britain and Spain on the Gibraltar issue, though not immediately. Spain applied to join the European Economic Community (EEC) and NATO, for which it needed British support. In 1980, talks between British and Spanish ministers led to the Lisbon Agreement, a statement on co-operation between the two countries which committed them to starting negotiations on Gibraltar's future and lifting the Spanish restrictions on communications with Gibraltar. Although Britain promised to "honour the freely and democratically expressed wishes of the people of Gibraltar", Prime Minister Margaret Thatcher indicated in the House of Commons that sovereignty would be on the table, in a change from the previous policy. However, the border was not reopened due to "technical issues" – code for unresolved issues between the two governments – and the agreement was strongly opposed by many Gibraltarians, who did not wish their sovereignty to be under discussion and objected to the lack of Gibraltarian representatives at the talks. The outbreak of the Falklands War in 1982 caused a further delay. Argentina carried out an unsuccessful sabotage operation, kept secret at the time, that was intended to sink a Royal Navy frigate in Gibraltar's harbour; the saboteurs were captured by the Spanish police in Algeciras before they could carry out their attack. A further agreement was reached in Brussels in 1984 which clarified the Lisbon Agreement and required that Britain allow Spaniards to live and work in Gibraltar, which they would have the right to do anyway as EEC citizens. The border was finally fully reopened on 4–5 February 1985.

Output: In what city did a further agreement occur that clarified the statement of co-operation issues in 1980 between British and Spanish ministers?


Input: Consider Input: Passage: Fodor's Chicago 2010 ranks the hotel as having one of the best spas and one of the best pools in the city. It also ranked the hotel as a Fodor's Choice among Chicago lodging options.  Fodor's also notes that the hotel has impeccable service and lavish amenities, but also notes that the hotel may be a bit "too decadent", with offerings such as $25 bottles of water.Frommer's Chicago 2010 describes the hotel as having the gorgeous views and upscale amenities to provide a place to go to live the life of a wealthy tourist. The building is praised for its location, which provides as many views along the Chicago River as possible. Its modern architecture is praised for "contemporary synthesis of adjacent building fabrics and modulations" that preserve the city's architectural heritage and integrate the riverfront setting.BlackBook Magazine's Guide to Chicago describes the Hotel as an embodiment of poshness which gives the visitor bragging rights upon his/her return home.Forbes Travel Guide describes the hotel as having an understated upscale lobby, sophisticated lounge, gorgeous restaurant and lavish rooms with amazing views.  It also describes the hotel as befitting of the Trump name in several ways.Time Out describes the building as a "testament to a vibrant 21st-century optimism in Chicago". It notes that the hotel meets all expectations attached to the name Trump in terms of luxury, modern conveniences and speaks highly of the views.Insight Guides describes the building's architectural swagger as fitting for the post-September 11 attacks skyline. Ten years after the September 11 attacks, Kamin described the building as the one that "best reveals how the Sept. 11 terrorist attacks either did or did not change architecture". Kamin clarified his belief:
Simply by virtue of standing there—and by being the tallest American building built since the 1974 completion of Sears (now Willis) Tower—Trump confounds those who predicted after 9/11 that iconic skyscrapers would never be built again. At the same time, Trump's height—originally pegged at more than 2,000 feet but eventually scaled back to 1,362 feet—suggests that the fear spawned by the attacks did have some effect.

Output: What is the final height in feet of the building that was ranked in 2010 as having one of the best spas?


Input: Consider Input: Passage: The centrifuge process was regarded as the only promising separation method in April 1942. Jesse Beams had developed such a process at the University of Virginia during the 1930s, but had encountered technical difficulties. The process required high rotational speeds, but at certain speeds harmonic vibrations developed that threatened to tear the machinery apart. It was therefore necessary to accelerate quickly through these speeds. In 1941 he began working with uranium hexafluoride, the only known gaseous compound of uranium, and was able to separate uranium-235. At Columbia, Urey had Karl Cohen investigate the process, and he produced a body of mathematical theory making it possible to design a centrifugal separation unit, which Westinghouse undertook to construct.Scaling this up to a production plant presented a formidable technical challenge. Urey and Cohen estimated that producing a kilogram (2.2 lb) of uranium-235 per day would require up to 50,000 centrifuges with 1-meter (3 ft 3 in) rotors, or 10,000 centrifuges with 4-meter (13 ft) rotors, assuming that 4-meter rotors could be built. The prospect of keeping so many rotors operating continuously at high speed appeared daunting, and when Beams ran his experimental apparatus, he obtained only 60% of the predicted yield, indicating that more centrifuges would be required. Beams, Urey and Cohen then began work on a series of improvements which promised to increase the efficiency of the process. However, frequent failures of motors, shafts and bearings at high speeds delayed work on the pilot plant. In November 1942 the centrifuge process was abandoned by the Military Policy Committee following a recommendation by Conant, Nichols and August C. Klein of Stone & Webster.


Output: What required high rotational speeds?