This task is about creating an unanswerable question based on a given passage. Construct a question that looks relevant to the given context but is unanswerable. Following are a few suggestions about how to create unanswerable questions:
(i) create questions which require satisfying a constraint that is not mentioned in the passage
(ii) create questions which require information beyond what is provided in the passage in order to answer
(iii) replace an existing entity, number, date mentioned in the passage with other entity, number, date and use it in the question
(iv) create a question which is answerable from the passage and then replace one or two words by their antonyms or insert/remove negation words to make it unanswerable.

Ex Input:
Passage: It is not clearly documented when the title of the Grand Duke was first introduced, but the importance of the Kiev principality was recognized after the death of Sviatoslav I in 972 and the ensuing struggle between Vladimir the Great and Yaropolk I. The region of Kiev dominated the state of Kievan Rus' for the next two centuries. The Grand Prince ("velikiy kniaz'") of Kiev controlled the lands around the city, and his formally subordinate relatives ruled the other cities and paid him tribute. The zenith of the state's power came during the reigns of Vladimir the Great (9801015) and Prince Yaroslav I the Wise (10191054). Both rulers continued the steady expansion of Kievan Rus' that had begun under Oleg.

Ex Output:
When was the title of Grand Duke introduced?

Ex Input:
Passage: When Yesun Temur died in Shangdu in 1328, Tugh Temur was recalled to Khanbaliq by the Qipchaq commander El Temur. He was installed as the emperor (Emperor Wenzong) in Khanbaliq, while Yesun Temur's son Ragibagh succeeded to the throne in Shangdu with the support of Yesun Temur's favorite retainer Dawlat Shah. Gaining support from princes and officers in Northern China and some other parts of the dynasty, Khanbaliq-based Tugh Temur eventually won the civil war against Ragibagh known as the War of the Two Capitals. Afterwards, Tugh Temur abdicated in favour of his brother Kusala, who was backed by Chagatai Khan Eljigidey, and announced Khanbaliq's intent to welcome him. However, Kusala suddenly died only four days after a banquet with Tugh Temur. He was supposedly killed with poison by El Temur, and Tugh Temur then remounted the throne. Tugh Temur also managed to send delegates to the western Mongol khanates such as Golden Horde and Ilkhanate to be accepted as the suzerain of Mongol world. However, he was mainly a puppet of the powerful official El Temur during his latter three-year reign. El Temur purged pro-Kusala officials and brought power to warlords, whose despotic rule clearly marked the decline of the dynasty.

Ex Output:
How did Yesun Temur die

Ex Input:
Passage: On December 8, 1991, at Viskuli near Brest (Belarus), the President of the Russian SFSR and the heads of Byelorussian SSR and Ukrainian SSR signed the "Agreement on the Establishment of the Commonwealth of Independent States" (known in media as Belavezha Accords). The document, consisting of a preamble and fourteen articles, stated that the Soviet Union ceased to exist as a subject of international law and geopolitical reality. However, based on the historical community of peoples, relations between them, given the bilateral treaties, the desire for a democratic rule of law, the intention to develop their relations based on mutual recognition and respect for state sovereignty, the parties agreed to the formation of the Commonwealth of Independent States. On December 12, the agreement was ratified by the Supreme Soviet of the Russian SFSR by an overwhelming majority: 188 votes for, 6 against, 7 abstentions. On the same day, the Supreme Soviet of the Russian SFSR denounced the Treaty on the Creation of the USSR and recalled all Russian deputies from the Supreme Soviet of the Soviet Union. The legality of this act is the subject of discussions because, according to the 1978 Constitution (Basic Law) of the Russian SFSR, the Russian Supreme Soviet had no right to do so. However, by this time the Soviet government had been rendered more or less impotent, and was in no position to object. Although the December 12 vote is sometimes reckoned as the moment that the RSFSR seceded from the collapsing Soviet Union, this is not the case. It appears that the RSFSR took the line that it was not possible to secede from an entity that no longer existed.

Ex Output:
In what country is Viskuli not located?