Input: Read this: Comparison of a back-translation with the original text is sometimes used as a check on the accuracy of the original translation, much as the accuracy of a mathematical operation is sometimes checked by reversing the operation. But the results of such reverse-translation operations, while useful as approximate checks, are not always precisely reliable. Back-translation must in general be less accurate than back-calculation because linguistic symbols (words) are often ambiguous, whereas mathematical symbols are intentionally unequivocal.
Question: How are mathematical operations checked?

Output: by reversing the operation


QUES: The terms international policing, transnational policing, and/or global policing began to be used from the early 1990s onwards to describe forms of policing that transcended the boundaries of the sovereign nation-state (Nadelmann, 1993), (Sheptycki, 1995). These terms refer in variable ways to practices and forms for policing that, in some sense, transcend national borders. This includes a variety of practices, but international police cooperation, criminal intelligence exchange between police agencies working in different nation-states, and police development-aid to weak, failed or failing states are the three types that have received the most scholarly attention.

What terms haven't been used to describe policing beyond one country?
What is the answer?
ANS: unanswerable


QUES: Lasers emitting in the red region of the spectrum have been available since the invention of the ruby laser in 1960. In 1962 the red helium–neon laser was invented, and these two types of lasers were widely used in many scientific applications including holography, and in education. Red helium–neon lasers were used commercially in LaserDisc players. The use of red laser diodes became widespread with the commercial success of modern DVD players, which use a 660 nm laser diode technology. Today, red and red-orange laser diodes are widely available to the public in the form of extremely inexpensive laser pointers. Portable, high-powered versions are also available for various applications. More recently, 671 nm diode-pumped solid state (DPSS) lasers have been introduced to the market for all-DPSS laser display systems, particle image velocimetry, Raman spectroscopy, and holography.
What type of laser is used in a LaserDisc player?

ANS: Red helium–neon


Due to the inter-communal ethnic tensions between 1963 and 1974, an island-wide census was regarded as impossible. Nevertheless, the Greek Cypriots conducted one in 1973, without the Turkish Cypriot populace. According to this census, the Greek Cypriot population was 482,000. One year later, in 1974, the Cypriot government's Department of Statistics and Research estimated the total population of Cyprus at 641,000; of whom 506,000 (78.9%) were Greeks, and 118,000 (18.4%) Turkish. After the partition of the island in 1974, Greeks conducted four more censuses: in 1976, 1982, 1992 and 2001; these excluded the Turkish population which was resident in the northern part of the island.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): Who was excluded from the censuses conducted by the Greeks?
Ah, so.. the Turkish population


Question: After gaining the Master Sword, Link is cleansed of the magic that kept him in wolf form, obtaining the Shadow Crystal. Now able to use it to switch between both forms at will, Link is led by Midna to the Mirror of Twilight located deep within the Gerudo Desert, the only known gateway between the Twilight Realm and Hyrule. However, they discover that the mirror is broken. The Sages there explain that Zant tried to destroy it, but he was only able to shatter it into fragments; only the true ruler of the Twili can completely destroy the Mirror of Twilight. They also reveal that they used it a century ago to banish Ganondorf, the Gerudo leader who attempted to steal the Triforce, to the Twilight Realm when executing him failed. Assisted by an underground resistance group they meet in Castle Town, Link and Midna set out to retrieve the missing shards of the Mirror, defeating those they infected. Once the portal has been restored, Midna is revealed to be the true ruler of the Twilight Realm, usurped by Zant when he cursed her into her current form. Confronting Zant, Link and Midna learn that Zant's coup was made possible when he forged a pact with Ganondorf, who asked for Zant's assistance in conquering Hyrule. After Link defeats Zant, Midna recovers the Fused Shadows, but destroys Zant after learning that only Ganondorf's death can release her from her curse. Returning to Hyrule, Link and Midna find Ganondorf in Hyrule Castle, with a lifeless Zelda suspended above his head. Ganondorf fights Link by possessing Zelda's body and eventually by transforming into a beast, but Link defeats him and Midna is able to resurrect Zelda.
Try to answer this question if possible: Whose body is used as a proxy by Link in order to fight Ganondorf?
Answer: unanswerable


Problem: In 2004 he was admitted as knight of the Légion d'honneur by president Jacques Chirac. On July 15, 2006, Spielberg was also awarded the Gold Hugo Lifetime Achievement Award at the Summer Gala of the Chicago International Film Festival, and also was awarded a Kennedy Center honour on December 3. The tribute to Spielberg featured a short, filmed biography narrated by Tom Hanks and included thank-yous from World War II veterans for Saving Private Ryan, as well as a performance of the finale to Leonard Bernstein's Candide, conducted by John Williams (Spielberg's frequent composer).[citation needed]
In what year was the first Gold Hugo Lifetime Achievement Award first handed out?
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Answer:
unanswerable