Here is a question about this article: Mahayana Buddhism received significant theoretical grounding from Nagarjuna (perhaps c. 150250 CE), arguably the most influential scholar within the Mahayana tradition. Nagarjuna's primary contribution to Buddhist philosophy was the systematic exposition of the concept of sunyata, or "emptiness", widely attested in the Prajnaparamita sutras that emerged in his era. The concept of emptiness brings together other key Buddhist doctrines, particularly anatta and dependent origination, to refute the metaphysics of Sarvastivada and Sautrantika (extinct non-Mahayana schools). For Nagarjuna, it is not merely sentient beings that are empty of atman; all phenomena (dharmas) are without any svabhava (literally "own-nature" or "self-nature"), and thus without any underlying essence; they are "empty" of being independent; thus the heterodox theories of svabhava circulating at the time were refuted on the basis of the doctrines of early Buddhism. Nagarjuna's school of thought is known as the Madhyamaka. Some of the writings attributed to Nagarjuna made explicit references to Mahayana texts, but his philosophy was argued within the parameters set out by the agamas. He may have arrived at his positions from a desire to achieve a consistent exegesis of the Buddha's doctrine as recorded in the Canon. In the eyes of Nagarjuna the Buddha was not merely a forerunner, but the very founder of the Madhyamaka system.
What is the answer to this question: Nagarjuna's main contribution was the exposition of the concept of what?
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So... sunyata

Here is a question about this article: The decline of Catalan continued in the 16th and 17th centuries. The Catalan defeat in the War of Spanish Succession (1714) initiated a series of measures imposing the use of Spanish in legal documentation.
What is the answer to this question: When was the war of Spanish Succession?
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So... 1714

Here is a question about this article: Herman Goldstine wrote: "One of his remarkable abilities was his power of absolute recall. As far as I could tell, von Neumann was able on once reading a book or article to quote it back verbatim; moreover, he could do it years later without hesitation. He could also translate it at no diminution in speed from its original language into English. On one occasion I tested his ability by asking him to tell me how A Tale of Two Cities started. Whereupon, without any pause, he immediately began to recite the first chapter and continued until asked to stop after about ten or fifteen minutes." Ulam noted that von Neumann's way of thinking might not be visual, but more of an aural one.
What is the answer to this question: Could von Neumann recall written text much later?
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So...
he immediately began to recite the first chapter and continued until asked to stop after about ten or fifteen minutes.