Input: Read this: 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]
Question: What was not a major cornerstone of Kiev wealth and prosperity?

Output: unanswerable

QUES: In nature, uranium is found as uranium-238 (99.2742%) and uranium-235 (0.7204%). Isotope separation concentrates (enriches) the fissionable uranium-235 for nuclear weapons and most nuclear power plants, except for gas cooled reactors and pressurised heavy water reactors. Most neutrons released by a fissioning atom of uranium-235 must impact other uranium-235 atoms to sustain the nuclear chain reaction. The concentration and amount of uranium-235 needed to achieve this is called a 'critical mass'.

What is the most prevalent unnatural isotope of uranium?
What is the answer?
ANS: unanswerable

QUES: Orthodox Judaism is the approach to religious Judaism which subscribes to a tradition of mass revelation and adheres to the interpretation and application of the laws and ethics of the Torah as legislated in the Talmudic texts by the Tanaim and Amoraim. These texts were subsequently developed and applied by later authorities, known as the Gaonim, Rishonim, and Acharonim. Orthodox Judaism generally includes Modern Orthodox Judaism ( ) and Ultra-Orthodox or Haredi Judaism ( ), but complete within is a wide range of philosophies. Although Orthodox Judaism would probably be considered the mainstream expression of Judaism prior to the 19th century, for some Orthodox Judaism is a modern self-identification that distinguishes it from traditional pre-modern Judaism.
Where will you not find Modern Judaism?

ANS: unanswerable

The greatest number of surviving Gothic buildings are churches. These range from tiny chapels to large cathedrals, and although many have been extended and altered in different styles, a large number remain either substantially intact or sympathetically restored, demonstrating the form, character and decoration of Gothic architecture. The Gothic style is most particularly associated with the great cathedrals of Northern France, the Low Countries, England and Spain, with other fine examples occurring across Europe.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What is one region with which the Gothic style is distinctly connected with?
Ah, so.. Northern France

Question: There are several academic libraries and archives in Paris. The Sorbonne Library in the 5th arrondissement is the largest university library in Paris. In addition to the Sorbonne location, there are branches in Malesherbes, Clignancourt-Championnet, Michelet-Institut d'Art et d'Archeologie, Serpente-Maison de la Recherche, and Institut des Etudes Iberiques. Other academic libraries include Interuniversity Pharmaceutical Library, Leonardo da Vinci University Library, Paris School of Mines Library, and the Rene Descartes University Library.
Try to answer this question if possible: What is the largest university library?
Answer: Sorbonne Library

QUES: The Finnish and Baltic invasions began a deterioration of relations between the Soviets and Germany. Stalin's invasions were a severe irritant to Berlin, as the intent to accomplish these was not communicated to the Germans beforehand, and prompted concern that Stalin was seeking to form an anti-German bloc. Molotov's reassurances to the Germans, and the Germans' mistrust, intensified. On June 16, as the Soviets invaded Lithuania, but before they had invaded Latvia and Estonia, Ribbentrop instructed his staff "to submit a report as soon as possible as to whether in the Baltic States a tendency to seek support from the Reich can be observed or whether an attempt was made to form a bloc."
Why did the Germans distrust the soviet agenda?

ANS:
Stalin's invasions were a severe irritant