input question: A friend asked me to answer this question: What did the company that toured the United States in 1984 produce in 1990?, using the article: Productions during the 1980s included the company's first presentations of Pelléas and Mélisande (1981), Parsifal (1986) and Billy Budd (1988). 1980s productions that remained in the repertory for many years included Xerxes directed by Hytner, and Rigoletto and The Mikado directed by Jonathan Miller. In 1984 ENO toured the United States; the travelling company, led by Elder, consisted of 360 people; they performed Gloriana, War and Peace, The Turn of the Screw, Rigoletto and Patience. This was the first British company to be invited to appear at the Metropolitan Opera in New York, where Patience received a standing ovation and Miller's production of Rigoletto, depicting the characters as mafiosi, was greeted with a mixture of enthusiasm and booing. In 1990 ENO was the first major foreign opera company to tour the Soviet Union, performing the Miller production of The Turn of the Screw, Pountney's production of Macbeth, and Hytner's much-revived Xerxes.The 'Powerhouse' era ended in 1992, when all three of the triumvirate left at the same time. The new general director was Dennis Marks, formerly head of music programmes at the BBC, and the new music director was Sian Edwards. Pountney's post of director of productions was not filled. Marks, inheriting a large financial deficit from his predecessors, worked to restore the company's finances, concentrating on restoring ticket sales to sustainable levels. A new production by Miller of Der Rosenkavalier was a critical and financial success, as was a staging of Massenet's Don Quixote, described by the critic Hugh Canning as "the kind of old-fashioned theatre magic which the hair-shirted Powerhouse regime despised".Marks was obliged to spend much time and effort in securing the funding for an essential restoration of the Coliseum, a condition on which ENO had acquired the freehold of the theatre in 1992. At the same time the Arts Council was contemplating a cut in the number of opera performances in London, at the expense of ENO, rather than Covent Garden. By..., what would be the answer ????
output answer: Beatrice and Benedict

A friend asked me to answer this question: Which soldier is an English teacher in their civilian life?, using the article: An elderly veteran visits the Normandy American Cemetery and Memorial with his family. At a tombstone, he falls to his knees with emotion. The scene then shifts to the morning of June 6, 1944, as American soldiers land on Omaha Beach as part of the Normandy Invasion. They suffer heavy losses in assaulting fortified German defensive positions. Captain Miller of the 2nd Ranger Battalion leads a breakout from the beach. Elsewhere on the beach, a dead soldier lies face-down in the bloody surf; his pack is stenciled Ryan, S. In Washington, D.C., at the U.S. War Department, General George Marshall learns that three of the four sons of the Ryan family were killed in action and that the fourth son, James, is with the 101st Airborne Division somewhere in Normandy. After reading Abraham Lincoln's Bixby letter aloud, Marshall orders Ryan brought home. Three days after D-Day, Miller receives orders to find Ryan and bring him back. He chooses seven men from his company—T/Sgt. Horvath, Privates First Class Reiben and Caparzo, Privates Mellish and Jackson, T/4 medic Wade—plus T/5 Upham, an interpreter from headquarters. They move out to Neuville, where they meet a squad of the 101st engaged against the enemy. Caparzo is killed by a German sniper who is then killed by Jackson. They locate a Private James Ryan but he is not the right one. From passing soldiers, Miller learns that Ryan is defending an important bridge in Ramelle. Near Ramelle, Miller decides to neutralize a German machine gun position at a derelict radar station, despite his men's misgivings. Wade is killed in the skirmish. At Upham's urging, Miller declines to execute a surviving German soldier, and sets him free. Losing confidence in Miller's leadership, Reiben declares his intention to desert, prompting a confrontation with Horvath. Miller defuses the standoff by disclosing his civilian career as a high school English teacher, about which his men had set up a betting pool; Reiben decides to stay., what would be the answer ?
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Answer: Captain Miller

Problem: Given the question: A friend asked me to answer this question: What is the name of the drilling fluid that is significantly more expensive than untreated petroleum fuels?, using the article: Drilling fluids are necessary for borehole stability in deep cores, and can also be used to circulate cuttings away from the bit.  Fluids used include water, ethanol/water and water/ethylene glycol mixtures, petroleum fuels, non-aromatic hydrocarbons, and n-butyl acetate. Water is the cheapest and cleanest option; it may be present on the glacial surface or may be created by thermal drilling.  In cold ice some form of antifreeze is necessary, or heat must be reapplied by reaming the hole periodically. Ethanol and water.  Ethanol acts as an anti-freeze in water; at sufficient concentrations it can reduce the freezing temperature of the mixture to well below any temperature likely to be encountered in ice drilling.  The concentration must be chosen to prevent the liquid freezing and also to maintain the borehole against the ice overburden pressure.  Because the density of the mixture decreases with lower temperatures, vertical convection will develop in boreholes where temperatures decrease with depth, as the lighter mixture rises.  This causes slush to form in the borehole, though successful drilling is still possible.  Ethanol is one of the cheapest options for a drilling fluid, and requires less storage space than other options because in use it is diluted with water.  A Soviet expedition left an 800 m borehole in Antarctica filled with ethanol and water at an ice temperature of −53 °C; after 11 months the borehole remained open and drilling was resumed with no problems.  A problem with this option is that the mixture will penetrate cores that have cracks. Ethylene glycol and water was used at Camp Century in 1966 in the lower part of the hole to dissolve the cuttings. Petroleum fuels.  This includes diesel, jet fuel, and kerosene. They are inexpensive and easily available, and were once in common use; disadvantages include flammability and the aromatics they contain, which are a health hazard. Non-aromatic hydrocarbons.  As of 2009 these had become the most commonly used drilling fluids; eliminating the..., what would be the answer ?
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The answer is:
Non-aromatic hydrocarbons