input question: Generate a question that has the following answer: a mutual obsession develops for the following movie plot: Erika Kohut is a piano professor at a Vienna music conservatory. Although already in her forties, she still lives in an apartment with her domineering mother. Her father is a long-standing resident in a psychiatric asylum. The audience is gradually shown truths about Erika's private life. Behind her assured facade, she is a woman whose sexual repression is manifested in a long list of paraphilia, including (but by no means limited to) voyeurism and sadomasochistic fetishes such as sexual self-mutilation. When Erika meets Walter Klemmer, a charming 17-year-old engineering student from a middle class background, a mutual obsession develops. Even though she initially attempts to prevent consistent contact and even tries to undermine his application to the conservatory, he eventually becomes her pupil. Like her, he appreciates and is a gifted interpreter of Schumann and Schubert. Erika destroys the musical prospects of an insecure but talented girl, Anna Schober, driven by her jealousy of the girl's contact with Walterand also, perhaps, by her fears that Anna's life will mirror her own. She does so by hiding shards of glass inside one of Anna's coat pockets, damaging her right hand and ruining her aspirations to play at the forthcoming jubilee concert. Erika then pretends to be sympathetic when Anna's mother asks for advice on her daughter's recuperation. (The sub-plot of the pupil and her mother, mirroring the main relationship in the film, is absent in Jelinek's novel.) In a moment of dramatic irony, the girl's mother rhetorically asks Erika who could do something so evil. Walter pursues Erika into a lavatory immediately after she has secretly ruined her pupil's hand. Walter passionately kisses Erika even though she is rebuffing him. Erika finally responds to his passion, but insists on repeatedly controlling, humiliating and frustrating Walter. Walter is increasingly insistent in his desire to start a sexual relationship with Erika, but Erika is only willing if he will satisfy her masochistic fantasies,...???
output answer: What happens when Erika meets Walter Klemmer?

Generate a question that has the following answer: Davidge is gunned down by a miner. for the following movie plot: In the late 21st century, an interstellar war between the humans (associated as the Bilateral Terran Alliance, or BTA) and the Dracs (a sentient, bipedal reptilian humanoid race) is fought. Battles are periodically fought between fighter spacecraft, and no human pilot hates the Dracs more than Willis E. Davidge (Dennis Quaid). During one such battle, Davidge and Drac pilot Jeriba Shigan (Louis Gossett, Jr.) engage in a dogfight which results in both crash-landing on Fyrine IV, an alien world uninhabited by intelligent life, with two moons, a breathable atmosphere, water, native fauna, and a hostile environment. After initial hostilities, the two eventually learn to cooperate to survive. They work together to build a shelter for protection against meteorite storms, a natural phenomenon that periodically strikes the planet. Over the next three years, they overcome their differences, become friends and learn each other's languages and cultures. Each saves the other's life several times. Davidge, haunted by dreams of spaceships landing on the planet, leaves in search of help. He finds evidence of humans, but learns that the planet has only been periodically visited by human miners known as "Scavengers", who use Dracs as slave labor. He returns to warn Jeriba, (nicknamed "Jerry"), only to discover that Jeriba is pregnant. It is revealed that Dracs reproduce asexually. A blizzard and an attack by an indigenous predator forces Davidge and Jeriba to flee their shelter. To pass the time Jeriba teaches Davidge his full lineage. Jeriba later slowly dies in childbirth, but not before making Davidge swear to take the child back to the Drac homeworld and recite his full ancestry, so that he can join Drac society. Davidge raises the child Zammis (Bumper Robinson). Davidge and Zammis form a very close bond and the young Drac loves Davidge as any sentient child loves a parent, despite referring to Davidge as "uncle". One day a ship flies overhead and Davidge goes to investigate. However, Zammis is curious and follows. He is...
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Answer: Who guns down Davidge ?

Problem: Given the question: Generate a question that has the following answer: It is unstable for the following movie plot: A pair of bizarre murders occur wherein the victims are drained of their rare Type One blood type. Reporter Walter Garrett (Wayne Morris) consults with his friend Dr. Mike Rhodes (Dennis Morgan) which leads them to Rhodes' former mentor, hematologist Dr. Francis Flegg (John Litel). Flegg is initially unhelpful, but when Garrett and Rhodes notice a striking resemblance between Flegg's strange assistant, Marshall Quesne (Humphrey Bogart) and the late Dr. Maurice Xavier, they confront Flegg. Flegg admits that he used scientific methods to bring Xavier back from the grave and employed a synthetic blood formula to sustain his life. However, the formula is unstable, and therefore, Quesne/Xavier must seek out human victims with the rare Type One blood type contained in the formula in order to stay alive. A hunt is begun for Quesne, who has discovered that Joan Vance (Rosemary Lane), a nurse and Rhodes' sweetheart, is a carrier of the rare blood type. He escapes with her in a taxi, professing to be taking her to Rhodes. Barnett and Rhodes, accompanied by the police, track them to their location. Quesne is shot dead, and Joan is saved from the fate of the others.
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The answer is:
What is the problem with this synthetic blood?