Russian fertilizer billionaire Dmitry Rybolovlev needed somewhere for his daughter, a student at an unidentified American university, to stay when she visited New York. Nothing too fancy—just an easy spot with a nice bedroom, an eat-in kitchen, maybe an office, and, while we're at it, a library, and, if possible, a terrace. Oh, and an in-apartment gallery. For her art. Around, say, 6,744 square feet? On Central Park West?