Task: Question Answering
Input (English): Passage: 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 Velázquez's portrait is "the painted equivalent of a manual for the education of the princess—a 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 Velázquez. 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 Velázquez'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 Dällenbach:
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 Velázquez 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 the painting.
Jonathan Miller asks: "What are we to make of the blurred features of the royal couple? It is unlikely that it has anything to do with the optical imperfection of the mirror, which would, in reality, have displayed a focused image of the King and Queen". He notes that "in addition to the represented mirror, he teasingly implies an unrepresented one, without which it is difficult to imagine how he could have shown himself painting the picture we now see". 
Question: What is the full name of the person who painted a mirror positioned at the back of the pictorial space?
Output (English): Jan van Eyck.