Please answer this: Given the following context: In Las Meninas, the king and queen are supposedly "outside" the painting, yet their reflection in the back wall mirror also places them "inside" the pictorial space.Snyder proposes it is "a mirror of majesty" or an allusion to the mirror for princes. While it is a literal reflection of the king and queen, Snyder writes "it is the image of exemplary monarchs, a reflection of ideal character" Later he focuses his attention on the princess, writing that Velazquez's portrait is "the painted equivalent of a manual for the education of the princessa mirror of the princess". The painting is likely to have been influenced by Jan van Eyck's Arnolfini Portrait, of 1434. At the time, van Eyck's painting hung in Philip's palace, and would have been familiar to Velazquez. The Arnolfini Portrait also has a mirror positioned at the back of the pictorial space, reflecting two figures who would have the same angle of vision as does the viewer of Velazquez's painting; they are too small to identify, but it has been speculated that one may be intended as the artist himself, though he is not shown in the act of painting. According to Lucien Dallenbach: The mirror [in Las Meninas] faces the observer as in Van Eyck's painting. But here the procedure is more realistic to the degree that the "rearview" mirror in which the royal couple appears is no longer convex but flat. Whereas the reflection in the Flemish painting recomposed objects and characters within a space that is condensed and deformed by the curve of the mirror, that of Velazquez refuses to play with the laws of perspective: it projects onto the canvas the perfect double of the king and queen positioned in front of the painting. Moreover, in showing the figures whom the painter observes, and also, through the mediation of the mirror, the figures who are observing him, the painter achieves a reciprocity of gazes that makes the interior oscillate with the exterior and which causes the image to "emerge from its frame" at the same time that it invites the visitors to enter... answer the following question: What is the full name of the person who painted a mirror positioned at the back of the pictorial space?
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Answer: Jan van Eyck

Problem: Given the following context: By 1930, Szigeti was established as a major international concert violinist. He performed extensively in Europe, the United States and Asia, and made the acquaintance of many of the era's leading instrumentalists, conductors and composers. In 1939, to escape the war and Nazi persecution of the Jews, Szigeti emigrated with his wife to the United States, where they settled in California. (A year later, Bartok also fled to America, and just two days after his arrival, he and Szigeti played a sonata recital at the Library of Congress in Washington, D.C.)During the 1930s, 1940s and into the 1950s, Szigeti recorded extensively, leaving a significant legacy. Notable recordings include the above-mentioned Library of Congress sonata recital; the studio recording of Bartok's Contrasts with Benny Goodman on clarinet and the composer at the piano; the violin concertos of Beethoven, Brahms, Mendelssohn, Prokofiev (No. 1) and Bloch under the batons of such conductors as Bruno Walter, Hamilton Harty and Sir Thomas Beecham; and various works by J.S. Bach, Busoni, Corelli, Handel and Mozart. One of his last recordings was of the Six Sonatas and Partitas for solo violin by Bach; although his technique had deteriorated noticeably by that time, the recording is prized for Szigeti's insight and depth of interpretation.In 1950, Szigeti was detained at Ellis Island upon returning from a European concert tour and was held for several days, officially "temporarily excluded" from the country. The reasons for his detention remain unclear. The following year, he became a naturalized American citizen. answer the following question: What is the name of the person that made a noble recording of Mozart?

A: Mozart

Q: Given the following context: The seabed contains enormous reserves of minerals which can be exploited by dredging. This has advantages over land-based mining in that equipment can be built at specialised shipyards and infrastructure costs are lower. Disadvantages include problems caused by waves and tides, the tendency for excavations to silt up and the washing away of spoil heaps. There is a risk of coastal erosion and environmental damage. Seafloor massive sulphide deposits are potential sources of silver, gold, copper, lead and zinc and trace metals since their discovery in the 1960s. They form when geothermally heated water is emitted from deep sea hydrothermal vents known as "black smokers". The ores are of high quality but prohibitively costly to extract. Small scale mining of the deep sea floor is being developed off the coast of Papua New Guinea using robotic techniques, but the obstacles are formidable.There are large deposits of petroleum, as oil and natural gas, in rocks beneath the seabed. Offshore platforms and drilling rigs extract the oil or gas and store it for transport to land. Offshore oil and gas production can be difficult due to the remote, harsh environment. Drilling for oil in the sea has environmental impacts. Animals may be disorientated by seismic waves used to locate deposits, probably causing the beaching of whales. Toxic substances such as mercury, lead and arsenic may be released. The infrastructure may cause damage, and oil may be spilt.Large quantities of methane clathrate exist on the seabed and in ocean sediment at a temperature of around 2 C (36 F) and these are of interest as a potential energy source. Some estimates put the amount available at between one and 5 million cubic kilometres (0.24 to 1.2 million cubic miles). Also on the seabed are manganese nodules formed of layers of iron, manganese and other hydroxides around a core. In the Pacific these may cover up to 30 percent of the deep ocean floor. The minerals precipitate from seawater and grow very slowly. Their commercial extraction for... answer the following question: What are of interest as a potential energy source?
A:
Large quantities of methane clathrate