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.

Q: Passage: The decline of Constantinople – a main trading partner of Kievan Rus' – played a significant role in the decline of the Kievan Rus'. The trade route from the Varangians to the Greeks, along which the goods were moving from the Black Sea (mainly Byzantine) through eastern Europe to the Baltic, was a cornerstone of Kiev wealth and prosperity. Kiev was the main power and initiator in this relationship, once the Byzantine Empire fell into turmoil and the supplies became erratic, profits dried out, and Kiev lost its appeal.[citation needed]

A: What played a minor rule in the decline of the Rus?
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Q: Passage: The word asphalt is derived from the late Middle English, in turn from French asphalte, based on Late Latin asphalton, asphaltum, which is the latinisation of the Greek ἄσφαλτος (ásphaltos, ásphalton), a word meaning "asphalt/bitumen/pitch", which perhaps derives from ἀ-, "without" and σφάλλω (sfallō), "make fall". Note that in French, the term asphalte is used for naturally occurring bitumen-soaked limestone deposits, and for specialised manufactured products with fewer voids or greater bitumen content than the "asphaltic concrete" used to pave roads. It is a significant fact that the first use of asphalt by the ancients was in the nature of a cement for securing or joining together various objects, and it thus seems likely that the name itself was expressive of this application. Specifically Herodotus mentioned that bitumen was brought to Babylon to build its gigantic fortification wall. From the Greek, the word passed into late Latin, and thence into French (asphalte) and English ("asphaltum" and "asphalt").

A: From where is the word limestone derived?
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Q: Passage: The Romans under Nero Claudius Drusus established a military outpost belonging to the Germania Superior Roman province at Strasbourg's current location, and named it Argentoratum. (Hence the town is commonly called Argentina in medieval Latin.) The name "Argentoratum" was first mentioned in 12 BC and the city celebrated its 2,000th birthday in 1988. "Argentorate" as the toponym of the Gaulish settlement preceded it before being Latinized, but it is not known by how long. The Roman camp was destroyed by fire and rebuilt six times between the first and the fifth centuries AD: in 70, 97, 235, 355, in the last quarter of the fourth century, and in the early years of the fifth century. It was under Trajan and after the fire of 97 that Argentoratum received its most extended and fortified shape. From the year 90 on, the Legio VIII Augusta was permanently stationed in the Roman camp of Argentoratum. It then included a cavalry section and covered an area of approximately 20 hectares. Other Roman legions temporarily stationed in Argentoratum were the Legio XIV Gemina and the Legio XXI Rapax, the latter during the reign of Nero.

A:
In what year did the Romans establish a military outpost?
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