In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Input: Consider Input: Passage: In part because he was overlooked until the mid-19th century, Velázquez found no followers and was not widely imitated. In particular, his visual and structural innovations in this portrayal of Venus were not developed by other artists until recently, largely owing to the censorship of the work. The painting remained in a series of private rooms in private collections until it was exhibited in 1857 at the Manchester Art Treasures Exhibition, along with 25 other paintings at least claimed to be by Velázquez; it was here that it became known as the Rokeby Venus. It does not appear to have been copied by other artists, engraved or otherwise reproduced, until this period. In 1890 it was exhibited in the Royal Academy in London, and in 1905 at Messrs. Agnews, the dealers who had bought it from Morritt. From 1906 it was highly visible in the National Gallery and became well-known globally through reproductions. The general influence of the painting was therefore long delayed, although individual artists would have been able to see it on occasion throughout its history.
Velázquez's portrait is a staging of a private moment of intimacy and a dramatic departure from the classical depictions of sleep and intimacy found in works from antiquity and Venetian art that portray Venus. However, the simplicity with which Velázquez displays the female nude—without jewellery or any of the goddess's usual accessories—was echoed in later nude studies by Ingres, Manet, and Baudry, among others. In addition, Velázquez's depiction of Venus as a reclining nude viewed from the rear was a rarity before that time, although the pose has been painted by many later artists. Manet, in his stark female portrayal Olympia, paraphrased the Rokeby Venus in pose and by suggesting the persona of a real woman rather than an ethereal goddess. Olympia shocked the Parisian art world when it was first exhibited in 1863. Olympia gazes directly out at the viewer, as does Velázquez's Venus, only through the reflection of the mirror.

Output: What is the title of that which was exhibited at Messrs in 1905??


Input: Consider Input: Passage: Zandalee Martin is a young boutique store owner living in New Orleans who is sexually frustrated and feeling unfulfilled with her marriage to Thierry Martin, and eventually gets tangled in a passionate, sensual and torrid iadulterous affair with her husband's mysterious and free spirited old friend Johnny Collins. Zandalee and Thierry's marriage has hit a snag and seems to be eroding due to his lack of passion. 
Zan needs to explore, while Thierry wants to withdraw, and has become more and more distant and impotent in their relationship. He used to be a poet, but now has taken over the family's communications business after the death of his father. As time goes on, Thierry has to sell the business and become basically a (vice president) figurehead. He is emotionally adrift as his dreams give way to disillusionment.
Johnny, an artist painter by trade, has been working for Thierry's business to help support his paintings. His only religion is self-gratification. Johnny also sells and mules cocaine for a local drug dealer as another source of income for himself. Having not seen each other in a while, the two run into each other at a bachelor's party. After the party, Thierry brings Johnny home to meet Zandalee and his grandmother Tatta. While talking about old times, Johnny offers to paint a portrait of Thierry at their home.

Output: What does Johnny's affair partner do for a living?


Input: Consider Input: Passage: The most promising but also the most challenging method of isotope separation was gaseous diffusion. Graham's law states that the rate of effusion of a gas is inversely proportional to the square root of its molecular mass, so in a box containing a semi-permeable membrane and a mixture of two gases, the lighter molecules will pass out of the container more rapidly than the heavier molecules. The gas leaving the container is somewhat enriched in the lighter molecules, while the residual gas is somewhat depleted. The idea was that such boxes could be formed into a cascade of pumps and membranes, with each successive stage containing a slightly more enriched mixture. Research into the process was carried out at Columbia University by a group that included Harold Urey, Karl P. Cohen and John R. Dunning.In November 1942 the Military Policy Committee approved the construction of a 600-stage gaseous diffusion plant. On 14 December, M. W. Kellogg accepted an offer to construct the plant, which was codenamed K-25. A cost plus fixed fee contract was negotiated, eventually totaling $2.5 million. A separate corporate entity called Kellex was created for the project, headed by Percival C. Keith, one of Kellogg's vice presidents. The process faced formidable technical difficulties. The highly corrosive gas uranium hexafluoride had to be used, as no substitute could be found, and the motors and pumps would have to be vacuum tight and enclosed in inert gas. The biggest problem was the design of the barrier, which would have to be strong, porous and resistant to corrosion by uranium hexafluoride. The best choice for this seemed to be nickel, and Edward Adler and Edward Norris created a mesh barrier from electroplated nickel. A six-stage pilot plant was built at Columbia to test the process, but the Norris-Adler prototype proved to be too brittle. A rival barrier was developed from powdered nickel by Kellex, the Bell Telephone Laboratories and the Bakelite Corporation. In January 1944, Groves ordered the Kellex barrier into production.


Output: What is the full name of the person Percival C. Keith worked for?