Input: Read this: Under modern constitutional conventions, the sovereign acts on the advice of his or her ministers. Since these ministers most often maintain the support of parliament and are the ones who obtain the passage of bills, it is highly improbable that they would advise the sovereign to withhold assent. An exception is sometimes stated to be if bills are not passed in good faith, though it is difficult to make an interpretation on what this circumstance might constitute. Hence, in modern practice, royal assent is always granted; a refusal to do so would be appropriate only in an emergency requiring the use of the monarch's reserve powers.
Question: Whose active powers are required when a royal assent is refused?

Output: unanswerable


Input: Read this: The early track record of the CIA was poor, with the agency unable to provide sufficient intelligence about the Soviet takeovers of Romania and Czechoslovakia, the Soviet blockade of Berlin, and the Soviet atomic bomb project. In particular, the agency failed to predict the Chinese entry into the Korean War with 300,000 troops. The famous double agent Kim Philby was the British liaison to American Central Intelligence. Through him the CIA coordinated hundreds of airdrops inside the iron curtain, all compromised by Philby. Arlington Hall, the nerve center of CIA cryptanalysisl was compromised by Bill Weisband, a Russian translator and Soviet spy. The CIA would reuse the tactic of dropping plant agents behind enemy lines by parachute again on China, and North Korea. This too would be fruitless.
Question: Who compromised hundreds of airdrops?

Output: Kim Philby


Input: Read this: In Canada, "college" generally refers to a two-year, non-degree-granting institution, while "university" connotes a four-year, degree-granting institution. Universities may be sub-classified (as in the Macleans rankings) into large research universities with many PhD granting programs and medical schools (for example, McGill University); "comprehensive" universities that have some PhDs but aren't geared toward research (such as Waterloo); and smaller, primarily undergraduate universities (such as St. Francis Xavier).
Question: A college teaches students for how many years in Macleans?

Output: unanswerable


Input: Read this: Aristotle however suggested that swallows and other birds hibernated. This belief persisted as late as 1878, when Elliott Coues listed the titles of no less than 182 papers dealing with the hibernation of swallows. Even the "highly observant" Gilbert White, in his posthumously published 1789 The Natural History of Selborne, quoted a man's story about swallows being found in a chalk cliff collapse "while he was a schoolboy at Brighthelmstone", though the man denied being an eyewitness. However, he also writes that "as to swallows being found in a torpid state during the winter in the Isle of Wight or any part of this country, I never heard any such account worth attending to", and that if early swallows "happen to find frost and snow they immediately withdraw for a time—a circumstance this much more in favour of hiding than migration", since he doubts they would "return for a week or two to warmer latitudes".
Question: Who wrote 182 papers dealing with the hibernation of swallows?

Output:
Elliott Coues