Given the question: Generate a question that has the following answer: Thorwald for the following movie plot: L.B. "Jeff" Jeffries (James Stewart) recuperates from a broken leg during a sweltering New York summer. As a successful photographer, he's known for taking difficult pictures no one else can get, including the one of an out-of-control race car which smashed his camera and broke his leg an instant after it was snapped. Jeffries lives in a small apartment, and spends his time in a wheelchair looking out the rear window into the courtyard of the building; he can also see into the lives of all his neighbors, catching glimpses of their daily routines. It's the sort of thing only an invalid might do, watching them eat, clean, sleep and argue. There's the girl who exercises in her underwear, the married couple who sleep on their small balcony to beat the heat, the struggling songwriter working at his piano; and there's the salesman who lives across the courtyard from Jeffries, the one with the nagging bedridden wife. They seem to fight all too often.Every day a therapist comes to visit Jeff, dispensing her mature wisdom and berating him for sitting there all day spying on his neighbors. Stella (Thelma Ritter) tells him she can smell trouble coming. He should get his mind off his neighbors and think about marrying that beautiful girlfriend of his. Jeff replies that he's not ready for marriage. Sure, she's a wonderful girl, but she's also a rich, successful socialite, and Jeff lives the life of a war correspondent, always on the go, usually living out his suitcase and often in an unpleasant environment. It's not the life he wants to offer her. "Well" says Stella, "that girl is packed with love for you right down to her fingertips.""That Girl" arrives shortly after Stella leaves. Lisa Carol Fremont (Grace Kelly) breezes in wearing a stunning satin dress, looking every inch the beautiful socialite she is, and obviously very much in love with Jeff. They have dinner, but soon enough the conversation turns to the future, and they quarrel. Jeff sees no way they can reconcile their different lifestyles, and she walks to the...
The answer is:
Who is leaving his apartment?