input question: Generate a question about the following movie plot: An American serving in WW1 falls in love with a very spirited nurse. On the Italy-Austrian front of World War I, Lt. Frederic Henry (Gary Cooper) is serving as an ambulance driver in the Italian army when he meets British nurse Catherine Barkley (Helen Hayes). He is a later wounded during an artillery barrage and is brought to a hospital in Milan where Barkley is assigned. They fall in love; their relationship is blessed post-facto by an Italian army chaplain. Henry returns to the front, but is frustrated that his correspondence with Barkley is blocked by his commanding officer Maj. Rinaldi (Adolphe Menjou) who is jealous of the relationship. Henry deserts and heads for Milan where he learns that Barkley, pregnant, has left for Switzerland. In Switzerland, Barkley is equally frustrated by the lack of correspondence from Henry. When her mail to Henry is returned to her, she collapses in shock, suffers a miscarriage, and becomes gravely ill. Henry finds her at the hospital and they profess their love as she dies in his arms. The movie closes with the ringing of church bells celebrating the signing of the Armistice and the end of the war???
output answer: During what war does the movie take place?

Generate a question about the following movie plot: This article's plot summary may be too long or excessively detailed. Please help improve it by removing unnecessary details and making it more concise. (October 2015) (Learn how and when to remove this template message) In 1939, a woman dies while giving birth in a slaughterhouse, and the manager disposes the baby in a dumpster. A young woman, Luda Mae Hewitt, finds the child while searching for food. She takes him back to the Hewitt residence, names him Thomas, and decides to raise him as her own. Thirty years later, Thomas works in the same factory in which his real mother died, working for the same man who left him in the dumpster. He is informed that the plant has been shut down by the health department, but refuses to leave until the boss forces his assistant to make him leave. Later, Tommy returns and brutally murders his boss. Before leaving, Tommy finds a chainsaw. Luda Mae's son, Charlie Hewitt, learns from the town's Sheriff what Tommy has done and accompanies him to arrest him. When they find Tommy, Charlie kills the Sheriff and assumes his identity. He takes his body back home and butchers him for stew meat. He informs the rest of the family that they'll never go hungry again. Two brothers, Eric and Dean, are driving across the country with their girlfriends, Chrissie and Bailey, to enlist in the Vietnam War. At a diner, they meet a female biker named Alex, who later follows them. Dean reveals he's decided not to enlist and burns his draft card, right before Alex draws a shotgun and orders the group to pull over. A chase ensues and the car crashes; Chrissie is thrown from the Jeep and lands in a field out of sight. Hoyt arrives and immediately shoots Alex. Hoyt finds Dean's burnt draft card and demands to know who it belongs to. To save his brother, Eric claims that it's his. After making them put Alex's body in his car, Hoyt forces the group in as well, and calls for Uncle Monty to tow the wreckage, which Chrissie is hiding in. Hoyt drives them to the Hewitt house and has Tommy butcher Alex's...
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Answer: Who did Chrissie flag down?

Problem: Given the question: Generate a question about the following movie plot: With Christmas only a few weeks away, Chicago resident Clark Griswold (Chevy Chase) decides it is time to get a Christmas tree. He gathers his wife Ellen (Beverly D'Angelo), daughter Audrey (Juliette Lewis) and son Rusty (Johnny Galecki) and drives out to the country where he picks out a huge tree. Realizing too late that they didn't bring any tools to cut the tree down, they are forced to uproot it instead, before driving home with the tree strapped to the roof of their car. Soon after, both Clark's and Ellen's parents arrive to spend Christmas, but their bickering quickly begins to annoy the family. Clark, however, maintains a positive attitude, determined to have a "good old-fashioned family Christmas." He covers the house's entire exterior with 25,000 twinkle lights, which fail to work at first, as he has accidentally wired them through his garage's light switch. When they finally come on, they temporarily cause a city-wide power shortage (forcing the power company to resort to nuclear generators for backup power) and create chaos for Clark's yuppie neighbors, Todd (Nicholas Guest) and Margo (Julia Louis-Dreyfus). While standing on the front lawn admiring the lights, Clark is shocked to see Ellen's cousin Catherine (Miriam Flynn) and her dense but bighearted husband Eddie (Randy Quaid), as they arrive unannounced with their children, Rocky and Ruby Sue, and their Rottweiler Dog Snots. Eddie later admits that they are living in the RV they drove to reach Chicago, as he is broke and has been forced to sell his home. Clark offers to buy gifts for Eddie's kids, so they can still enjoy a wonderful Christmas. With Christmas approaching quicker than ever, Clark begins to wonder why his boss, Frank Shirley (Brian Doyle-Murray), has not given him his yearly bonus, which he desperately needs to replace an advance payment he has made to install a swimming pool. After a disastrous Christmas Eve dinner, he finally receives an envelope from a company messenger, who had overlooked it the day before. Instead of the...
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The answer is:
When does he receive the envelope?