input question: Generate a question that has the following answer: Chris and CJ for the following movie plot: In 1959, on board a spacecraft, two aliens race to keep an experiment from being released by a third member of the crew. The seemingly possessed third alien shoots the canister into space where it crashes to Earth. Nearby, a college man takes his date to a parking spot when they see a falling star and investigate. It lands in the path of an escaped criminally insane mental patient. As his date is attacked by the axe-wielding maniac, the boy finds the canister, from which a small slug-like thing jumps out and into his mouth. Twenty-seven years later, Chris Romero pines over a love lost, supported by his disabled friend J.C. During pledge week at Corman University, Chris spots a girl, Cynthia Cronenberg, and falls instantly in love. To get her attention, he decides to join a fraternity. Cynthia's boyfriend, who heads the fraternity, tasks them with stealing a cadaver from the university medical center and depositing it on the steps of a sorority house. Chris and J.C. find a frozen corpse in a secret room, but when it grabs them, they flee. Meanwhile, Detective Ray Cameron, a haunted cop, is called in to the cryogenics lab break-in, where he discovers one of the bodies the boy who discovered the alien experiment in 1959 is now missing, set free by Chris and J.C. The corpse makes its way back to the sorority house where he picked up his date twenty-seven years ago. There, his head splits open and releases more of the slugs. Called to the scene, Det. Cameron finds the body, interpreting the condition of the head as the result of an axe wound in the face. The next day, the fraternity brothers confront Chris and J.C., who they believe to be responsible for the previous night's incident. They are then taken in for questioning by the police. Based on the testimony of a janitor that witnessed them running out of the university medical center, "screaming like banshees," they confess to breaking in but deny moving the corpse. That night, a dead attendant rises from his slab and runs into the same janitor. Cynthia...???
output answer: Who attempts to steal the cadaver?

input question: Generate a question that has the following answer: Tverdilo for the following movie plot: The Teutonic Knights invade and conquer the city of Pskov with the help of the traitor Tverdilo and massacre its population. In the face of resistance by the boyars and merchants of Novgorod (urged on by the monk Ananias), Nevsky rallies the common people of Novgorod and in a decisive Battle of the Ice, on the surface of the frozen Lake Peipus or Chudskoe, they defeat the Teutonic knights. The story ends in the retaken Pskov where the ordinary foot-soldiers are set free, the surviving Teutonic knights will be held for ransom and Tverdilo is swarmed over by the vengeful people (and supposedly torn to pieces). A subplot throughout the film concerns Vasili Buslai and Gavrilo Oleksich, two famous warriors from Novgorod and friends, who become commanders of the Novgorod forces and who engage in a contest of courage and fighting skill throughout the Battle on the Ice in order to decide which of them will win the hand of Olga Danilovna, a Novgorod maiden whom both of them are courting. Vasilisa, the daughter of a boyar of Pskov killed by the Germans, joins the Novgorod forces as a front-line soldier, and she and Buslai fight side by side (which makes a strong impression on Buslai); she also personally slays the traitor Ananias. After both Gavrilo and Buslai have been seriously wounded, Buslai publicly states that neither he nor Gavrilo was the bravest in battle: that honor goes to Vasilisa, and that after her came Gavrilo. Thus Gavrilo and Olga are united, while Buslai chooses Vasilisa as his bride-to-be (with her unspoken consent).???
output answer: Who was the traitor of the story?

input question: Generate a question that has the following answer: Praxis for the following movie plot: The USS Excelsior weathers the shock wave generated by the explosion of Praxis.[4] As a Klingon moon, Praxis, explodes without warning, the starship USS Excelsior, commanded by Captain Hikaru Sulu, is struck by the shock wave and its crew discovers that much of the moon has been obliterated. The loss of their key energy production facility and the destruction of the Klingon homeworld's ozone layer throws the Klingon Empire into turmoil. No longer able to maintain a hostile footing, the Klingons sue for peace with their longstanding enemy, the United Federation of Planets. Accepting the proposal before the Klingons revert to a more belligerent approach, Starfleet sends the USS Enterprise-A to meet with the Klingon Chancellor, Gorkon, and escort him to negotiations on Earth. Enterprise's captain, James T. Kirk, whose son David was murdered by Klingons years earlier, opposes the negotiations and resents his assignment. After a rendezvous between Enterprise and Gorkon's battlecruiser they continue towards Earth, with the crews sharing a tense meal aboard Enterprise. Later that night, Enterprise appears to fire on the Klingon ship with a pair of photon torpedoes, disabling the artificial gravity aboard the Klingon vessel. During the confusion, two figures wearing Starfleet suits and gravity boots beam aboard the Klingon ship and grievously wound Gorkon before beaming away. Kirk surrenders to avoid a fight, and beams aboard the Klingon ship with Doctor Leonard McCoy to attempt to save Gorkon's life. The chancellor dies, and Gorkon's chief of staff, General Chang, puts Kirk and McCoy on trial for his assassination. The pair are found guilty and sentenced to life imprisonment on the frozen asteroid Rura Penthe. Gorkon's daughter, Azetbur, becomes the new chancellor, and continues diplomatic negotiations; for reasons of security, the conference is relocated and the new location is kept secret. While several senior Starfleet officers want to rescue Kirk and McCoy, the Federation president refuses to risk full-scale...???
output answer:
What explodes, causing teh shock wave that hits the USS Excelsior?