Problem: Given the question: Extract the answer to the question from the following context. Question: Why did Bell feel he was vindicated? Context: The question of priority for the variable resistance feature of the telephone was raised by the examiner before he approved Bell's patent application. He told Bell that his claim for the variable resistance feature was also described in Gray's caveat. Bell pointed to a variable resistance device in Bell's previous application in which Bell described a cup of mercury, not water. Bell had filed the mercury application at the patent office a year earlier on February 25, 1875, long before Elisha Gray described the water device. In addition, Gray abandoned his caveat, and because he did not contest Bell's priority, the examiner approved Bell's patent on March 3, 1876. Gray had reinvented the variable resistance telephone, but Bell was the first to write down the idea and the first to test it in a telephone.
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The answer is:
Bell described a cup of mercury, not water

Problem: Given the question: Extract the answer to the question from the following context. Question: What was the odd discovery about the range? Context: Initially, the station's range was officially a 40 kilometres radius of the Alexandra Palace transmitterin practice, however, transmissions could be picked up a good deal further away, and on one occasion in 1938 were picked up by engineers at RCA in New York, who were experimenting with a British television set.
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The answer is:
picked up by engineers at RCA in New York, who were experimenting with a British television set

Problem: Given the question: Extract the answer to the question from the following context. Question: Which of the following are not wood extractives: fatty acids, resin acids, or insects? Context: Aside from the lignocellulose, wood consists of a variety of low molecular weight organic compounds, called extractives. The wood extractives are fatty acids, resin acids, waxes and terpenes. For example, rosin is exuded by conifers as protection from insects. The extraction of these organic materials from wood provides tall oil, turpentine, and rosin.
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The answer is:
insects