input question: Generate a question that has the following answer: Dog for the following movie plot: In 1927, silent film star George Valentin is posing for pictures outside the premiere of his latest hit film when a young woman, Peppy Miller, accidentally bumps into him. Valentin reacts with humor to the accident and shows off with Peppy for the cameras. The next day, Peppy finds herself on the front page of Variety with the headline "Who's That Girl?" Later, Peppy auditions as a dancer and is spotted by Valentin, who insists that she have a part in Kinograph Studios' next production, despite objections from the studio boss, Al Zimmer. While performing a scene in which they dance together, Valentin and Peppy show great chemistry, despite her being merely an extra. With a little guidance from Valentin (he draws a beauty spot on her, which will eventually be her trademark, after finding her in his dressing room), Peppy slowly rises through the industry, earning more prominent starring roles. Two years later, Zimmer announces the end of production of silent films at Kinograph Studios, but Valentin is dismissive, insisting that sound is just a fad. In a dream, Valentin begins hearing sounds from his environment (as does the audience), but cannot speak himself, then wakes up in a sweat. He decides to produce and direct his own silent film, financing it himself. The film opens on the same day as Peppy's new sound film as well as the 1929 Stock Market Crash. Now Valentin's only chance of avoiding bankruptcy is for his film to be a hit. Unfortunately audiences flock to Peppy's film instead and Valentin is ruined. His wife, Doris, kicks him out, and he moves into an apartment with his valet/chauffeur, Clifton, and his dog. Peppy goes on to become a major Hollywood star. Later, the bankrupt Valentin is forced to auction off all of his personal effects, and after realizing he has not paid loyal Clifton in over a year, gives him the car and fires him, telling him to get another job. Depressed and drunk, Valentin angrily sets a match to his private collection of his earlier films. As the nitrate film quickly blazes out...???
output answer: What attracts the policeman to the burning house?

input question: Generate a question that has the following answer: Two wardrobes for the following movie plot: In early 1900s London, magician Robert Angier performs his trick, 'The Real Transported Man,' to a sold out theater. Rival magician Alfred Borden, in disguise, sneaks under the stage. At the trick's culmination, Angier drops through a trap door and into a waiting water tank, where Borden watches him drown. At Borden's murder trial, Angier's ingenieur, John Cutter testifies how Borden pushed the water tank under the trap door to catch and kill Angier during his New Transported Man trick. In prison, Borden is visited by an agent of Lord Caldlow, who offers to care for Borden's daughter Jess in exchange for all of Borden's tricks. As a show of good faith, Caldlow gives Borden a copy of Angier's diary, which Borden reads. In flashback, Angier and Borden work as shills for Milton the Magician, alongside ingenieur John Cutter and assistant Julia, who is also Angier's wife. Milton's famous trick is the water tank trick, where Julia is bound in ropes and dropped in a water tank, from which she frees herself and escapes. Borden, with Julia's consent, ties her hands with a more secure, yet difficult knot. Julia fails to slip the knot and drowns, infuriating Angier and fueling his deep-seated grudge against Borden. Borden launches a solo magic career and hires the silent, mysterious Fallon as his ingenieur, Borden courts and eventually marries Sarah, who gives birth to their daughter, Jess. At his first show, Borden's bullet catch trick is sabotaged by Angier, and Borden loses two fingers. Angier launches his own magic career, hiring Olivia Wenscombe as his assistant and Cutter as his ingenieur. During the finale of Angier's show, a disguised Borden sabotages Angier's bird cage act, which maims an audience member and ruins Angier's reputation. Angier discovers, and subsequently steals Borden's fantastic trick "The Transported Man," where Borden instantly travels between two wardrobes on opposite ends of a stage. Cutter and Olivia groom Root, an out-of-work actor, into a "double" for Angier, to mimic his appearance...???
output answer: In Borden's Transported Man trick, what does he travel between?

input question: Generate a question that has the following answer: National Security Agency. for the following movie plot: A hostage situation in South Dakota: FBI Agent Art Jeffries (Bruce Willis), as the inside man, protects a 14-year-old boy named James while trying to talk bank robber Edgar Halstrom (Richard Riehle) into surrendering. However, the FBI task force moves in, and in the ensuing firefight both James and the robbers are killed. Jeffries confronts his superior, Hartley, who tells him they both must answer to Washington. An infuriated Jeffries punches Hartley in reply. A cryptographic code called "Mercury" was created by the National Security Agency and is allegedly so complex that its creators believe no computer on Earth can decipher it. Originally it was created during the Reagan Administration as a test to keep the United States' highest priority secrets under wraps. One day, the NSA receives a message from a 9-year-old autistic savant named Simon Lynch (Miko Hughes), who calls a telephone number written in the code which was secretly published in a puzzle magazine by two of the creators, Dean Crandell (Robert Stanton) and Leo Pedranski (Bodhi Elfman), to see if anyone could break it. Crandell and Pedranski's division chief, Lt. Colonel Nicholas Kudrow (Alec Baldwin) sees the boy's ability to decipher the code as a grave liability. He dispatches assassin Peter Burrell (Lindsey Lee Ginter) to murder the boy and his parents, Martin (John Carroll Lynch) and Jenny (Kelley Hazen). After shooting Martin and Jenny, Burrell searches the house, fails to find Simon, and leaves at the sound of approaching sirens (Martin was able to call 911 before dying). Jeffries, who has been demoted following a diagnosis of delusional paranoia, is sent to investigate what is initially thought to be a murder-suicide. While investigating the scene, Jeffries finds Simon hiding in a cache of his bedroom closet and takes the boy under his wing. Jeffries begins to realize the difficulty of protecting, let alone questioning, Simon because of his impaired social abilities as a result of his autism, but the Chicago Police Department agree to...???
output answer:
Who created mercury?