Problem: Nanjing:

Nanjing Library, founded in 1907, houses more than 10 million volumes of printed materials and is the third largest library in China, after the National Library in Beijing and Shanghai Library. Other libraries, such as city-owned Jinling Library and various district libraries, also provide considerable amount of information to citizens. Nanjing University Library is the second largest university libraries in China after Peking University Library, and the fifth largest nationwide, especially in the number of precious collections.

What is the Nanjing Library's ranking in China?
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A: the third largest library in China

Problem: Queen's last album featuring Mercury, titled Made in Heaven, was finally released in 1995, four years after his death. Featuring tracks such as "Too Much Love Will Kill You" and "Heaven for Everyone", it was constructed from Mercury's final recordings in 1991, material left over from their previous studio albums and re-worked material from May, Taylor, and Mercury's solo albums. The album also featured the song "Mother Love", the last vocal recording Mercury made prior to his death, which he completed using a drum machine, over which May, Taylor and Deacon later added the instrumental track. After completing the penultimate verse, Mercury had told the band he "wasn't feeling that great" and stated, "I will finish it when I come back, next time"; however, he never made it back into the studio, so May later recorded the final verse of the song. Both stages of recording, before and after Mercury's death, were completed at the band's studio in Montreux, Switzerland. The album reached No. 1 on the UK charts immediately following its release, and has sold 20 million copies worldwide. On 25 November 1996, a statue of Mercury was unveiled in Montreux overlooking Lake Geneva, almost five years to the day since his death.
How many copies worldwide has Queen's 1995 album sold?
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Answer: 20 million

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
An important creation myth of the islands of Tuvalu is the story of the te Pusi mo te Ali (the Eel and the Flounder) who created the islands of Tuvalu; te Ali (the flounder) is believed to be the origin of the flat atolls of Tuvalu and the te Pusin (the Eel) is the model for the coconut palms that are important in the lives of Tuvaluans. The stories as to the ancestors of the Tuvaluans vary from island to island. On Niutao, Funafuti and Vaitupu the founding ancestor is described as being from Samoa; whereas on Nanumea the founding ancestor is described as being from Tonga.
From what land did the people of Niutao believe they came?
A: Samoa

Context and question: In psychology, memory is the process in which information is encoded, stored, and retrieved. Encoding allows information from the outside world to be sensed in the form of chemical and physical stimuli. In the first stage the information must be changed so that it may be put into the encoding process. Storage is the second memory stage or process. This entails that information is maintained over short periods of time. Finally the third process is the retrieval of information that has been stored. Such information must be located and returned to the consciousness. Some retrieval attempts may be effortless due to the type of information, and other attempts to remember stored information may be more demanding for various reasons.
What is the third process that happens during the memory process?
Answer: retrieval of information that has been stored

Question: The law of the United States comprises many levels of codified and uncodified forms of law, of which the most important is the United States Constitution, the foundation of the federal government of the United States. The Constitution sets out the boundaries of federal law, which consists of acts of Congress, treaties ratified by the Senate, regulations promulgated by the executive branch, and case law originating from the federal judiciary. The United States Code is the official compilation and codification of general and permanent federal statutory law.
Is there an answer to this question: Laws that are only general are called what?

Answer: unanswerable

QUES: By the end of the 12th century, samurai became almost entirely synonymous with bushi, and the word was closely associated with the middle and upper echelons of the warrior class. The samurai were usually associated with a clan and their lord, were trained as officers in military tactics and grand strategy, and they followed a set of rules that later came to be known as the bushido. While the samurai numbered less than 10% of then Japan's population, their teachings can still be found today in both everyday life and in modern Japanese martial arts.

What class were samurais?
What is the answer?
ANS:
middle and upper echelons of the warrior class