Extract the answer to the following question from the movie plot. If the question isn't answerable, please output "Can't answer". Question: What does Carter prompt McClane to do ? Title: Die Hard: With a Vengeance Movie plot: In New York City, the Bonwit Teller department store is destroyed by a bomb during the morning commute. The New York City Police Department receive a call from "Simon" ordering them that suspended police officer Lt. John McClane be dropped in Harlem wearing a sandwich board that says "I hate niggers" and threatening to detonate another bomb if they don't comply. They collect McClane and follow Simon's instructions; McClane is saved from a potential attack by young men by Zeus Carver, a nearby shop owner. McClane and Carver escape and return to headquarters, where Simon calls again and threatens to detonate more bombs if McClane and Carver do not follow his instructions. Simon sends the two on a series of children's riddles. He tells them to reach Wall Street station 90 blocks south, within 30 minutes to stop a bomb planted on a Brooklyn-bound 3 train. McClane boards the subway while Carver drives. McClane locates the bomb and throws it off the train, it still detonates, derailing the train and sending it through the station with minimal injuries due to Carver's warnings. As McClane and Carver regroup with the police, they are met by FBI agents, who reveal Simon is Peter Krieg, a former Colonel in the East German People's Army and a mercenary-for-hire. Krieg is after McClane as Krieg's birth name is Simon Peter Gruber, the brother of Hans Gruber whom McClane had previously killed in Nakatomi Towers. Simon calls the police, knowing the FBI is there, that he has planted a bomb in a public school and rigged with a radio detonator triggered by the police band. Simon tells them that he will get McClane and Carver the school's location if they continue to play his game. While McClane and Carver set off on Simon's next task, the police organize all the city's public works to begin searching schools, using 9-1-1 to coordinate activities. As McClane solves Simon's riddles, he recognizes that Simon is using the school bomb distraction to draw the police away from Wall Street. They arrive too late to find that Simon and...
call his wife