Problem: Solar energy:

Solar hot water systems use sunlight to heat water. In low geographical latitudes (below 40 degrees) from 60 to 70% of the domestic hot water use with temperatures up to 60 °C can be provided by solar heating systems. The most common types of solar water heaters are evacuated tube collectors (44%) and glazed flat plate collectors (34%) generally used for domestic hot water; and unglazed plastic collectors (21%) used mainly to heat swimming pools.

What is a common type of solar water heater?
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A: evacuated tube collectors


Problem: Following a custom she maintained throughout her widowhood, Victoria spent the Christmas of 1900 at Osborne House on the Isle of Wight. Rheumatism in her legs had rendered her lame, and her eyesight was clouded by cataracts. Through early January, she felt "weak and unwell", and by mid-January she was "drowsy ... dazed, [and] confused". She died on Tuesday, 22 January 1901, at half past six in the evening, at the age of 81. Her son and successor King Edward VII, and her eldest grandson, Emperor Wilhelm II of Germany, were at her deathbed. Her favourite pet Pomeranian, Turri, was laid upon her deathbed as a last request.
Who was Queen Victoria's successor?
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Answer: King Edward VII


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
The political situation in England rapidly began to deteriorate. Longchamp refused to work with Puiset and became unpopular with the English nobility and clergy. John exploited this unpopularity to set himself up as an alternative ruler with his own royal court, complete with his own justiciar, chancellor and other royal posts, and was happy to be portrayed as an alternative regent, and possibly the next king. Armed conflict broke out between John and Longchamp, and by October 1191 Longchamp was isolated in the Tower of London with John in control of the city of London, thanks to promises John had made to the citizens in return for recognition as Richard's heir presumptive. At this point Walter of Coutances, the Archbishop of Rouen, returned to England, having been sent by Richard to restore order. John's position was undermined by Walter's relative popularity and by the news that Richard had married whilst in Cyprus, which presented the possibility that Richard would have legitimate children and heirs.
Who refused to work with Puiset?
A: Longchamp


Context and question: To compete with the popular Family Computer in Japan, NEC Home Electronics launched the PC Engine in 1987, and Sega Enterprises followed suit with the Mega Drive in 1988. The two platforms were later launched in North America in 1989 as the TurboGrafx-16 and the Genesis respectively. Both systems were built on 16-bit architectures and offered improved graphics and sound over the 8-bit NES. However, it took several years for Sega's system to become successful. Nintendo executives were in no rush to design a new system, but they reconsidered when they began to see their dominance in the market slipping.
How was the 8-bit NES an improvement?
Answer: unanswerable


Question: Rome offers no native creation myth, and little mythography to explain the character of its deities, their mutual relationships or their interactions with the human world, but Roman theology acknowledged that di immortales (immortal gods) ruled all realms of the heavens and earth. There were gods of the upper heavens, gods of the underworld and a myriad of lesser deities between. Some evidently favoured Rome because Rome honoured them, but none were intrinsically, irredeemably foreign or alien. The political, cultural and religious coherence of an emergent Roman super-state required a broad, inclusive and flexible network of lawful cults. At different times and in different places, the sphere of influence, character and functions of a divine being could expand, overlap with those of others, and be redefined as Roman. Change was embedded within existing traditions.
Is there an answer to this question: What did Rome make the myriad various cults?

Answer: lawful


Problem: Late Middle Ages:

Despite these crises, the 14th century was also a time of great progress in the arts and sciences. Following a renewed interest in ancient Greek and Roman texts that took root in the High Middle Ages, the Italian Renaissance began. The absorption of Latin texts had started before the Renaissance of the 12th century through contact with Arabs during the Crusades, but the availability of important Greek texts accelerated with the capture of Constantinople by the Ottoman Turks, when many Byzantine scholars had to seek refuge in the West, particularly Italy.

Which conflicts brought Europeans into contact with Arabs prior to the 11th century?
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A:
unanswerable