input question: Generate a question that has the following answer: Boyfriend and girlfriend for the following movie plot: The Grudge describes a curse that is born when someone dies in the grip of a powerful rage or extreme sorrow. The curse is an entity created where the person died. Those who encounter this evil supernatural force die; and the curse is reborn repeatedly, passed from victim to victim in an endless, growing chain of horror. The following events are explained in their actual order; the original film is presented in a non-linear narrative. The Saeki family lived happily in suburban Tokyo, but housewife Kayako Saeki fell in love with her college professor, Peter Kirk, obsessively writing about him in her diary. However, her husband Takeo discovered the diary. Believing Kayako was having an affair, he became mentally disturbed and murdered his wife by pushing her off the stairs, snapping her neck to a 90 degree angle and crushing her throat. He then drowned his young son Toshio - who witnessed the act - in the bathtub to cover his tracks, along with the pet cat, Mar. Takeo hid the bodies in the attic and closet, before Kayako's ghost murdered him by hanging him with her hair in Toshio's bedroom. Peter came to the Saeki house to speak to Kayako after receiving a letter from her, only to find her corpse. Shocked, he fled the house, killing himself the next day by falling over the balcony of his building complex in front of his wife. The Saeki family rose again as ghosts due to their rage and sorrow, notably Kayako, who appears as an onryo ghost, leaving the curse on the house. The present timeline starts a few years later with the Williams family moving in from America. While husband Matt is thrilled with the house, his wife Jennifer and dementia-ridden mother Emma feel uncomfortable. Jennifer is quickly consumed by the curse. Matt returns home to find the house trashed, Emma upset, and his wife dying. Matt and Jennifer are killed by Toshio. Yoko, a careworker, arrives at the house the next day to find Emma alone, and encounters Kayako, who attacks her. Concerned about Yoko's disappearance, her employer Alex sends...???
output answer: What is the relationship between Karen and Doug?

Generate a question that has the following answer: Abby for the following movie plot: Elizabeth Masterson (Witherspoon), a young emergency medicine physician whose work is her whole life, is in a serious car accident while on her way to a blind date. Three months later, David Abbott (Ruffalo), a landscape architect recovering from the sudden death of his wife, moves into the apartment that had been Elizabeth's, after 'discovering' it in what seems to be a 'fateful' happenstance. Elizabeth's spirit begins to appear to David in the apartment with ghostly properties and abilities that make it clear that something is not right. She can suddenly appear and disappear, walk or move through walls and objects, and once takes over his actions. When they meet, they are both surprised, as Elizabeth is still unaware of her recent history and refuses to think she is dead. David tries to have her spirit exorcised from the apartment, but to no avail. Since only David can see and hear her, others think that he is hallucinating and talking to himself. David and Elizabeth's spirit begin to 'bond', as much as that is possible, and he takes her out-of-town to a beautiful landscaped garden he designed. Elizabeth tells him she senses she has 'been there' before, and, in fact, the garden was something she was dreaming of in the opening scenes of the film, where she was awakened by a colleague from cat-napping after working a 26-hour shift in the hospital. Together, assisted by a psychic bookstore clerk, Darryl (Heder), Elizabeth and David find out who she is, what happened to her, and why they are connected. She is not dead, but in a coma, her body being kept on life support at the hospital where she used to work. When David discovers that in accordance with her living will, she will soon be allowed to die, he tries to prevent this by telling Elizabeth's sister, Abby, that he can see her and what the situation involves. It is revealed that one of Elizabeth's young nieces can also sense her presence. Abby thinks David is mentally disturbed and drives him out of her house. Desperate, David decides to prevent...
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Answer: Who is Elizabeth's sister?

Problem: Given the question: Generate a question that has the following answer: Dr. Tenma for the following movie plot: Toby Tenma is a teenager who lives in the futuristic city-state Metro City, which floats above the polluted "Surface". Toby's father, Dr. Tenma, is a famous roboticist and head of the Ministry of Science, but has a distant relationship with his son. Dr. Tenma meets the city's obstructive leader President Stone to demonstrate a new defensive robot called the Peacekeeper. To power it, Tenma's friend Dr. Elefun unveils the Blue and Red Core, two energy spheres which have opposing positive and negative energy. Stone has the destructive Red Core placed into the Peacekeeper, causing it to go berserk, leading to Toby being disintegrated after sneaking into the room. A distraught Tenma secretly constructs a robotic replica of Toby, complete with his memories, but has built-in defenses to protect him and is powered by the Blue Core. Toby's replica is awakened, believing nothing has happened. While he has Toby's mind, his personality is different in Tenma's eyes, when in actuality it is quite similar. Toby discovers his robotic capabilities including rocket-powered flight and the ability to understand other robots. Toby flies home but learns from Tenma of his origins and is rejected by him, flying away much to the sadness of Dr. Elefun. Stone, desperate to win a re-election, has Toby pursued by his guards but the battle leads to Toby tumbling off the city edge onto the Surface. Tenma and Elefun are arrested. Toby awakens in an enormous junkyard, created from the redundant robots dumped by Metro City. He is found by a group of human children, illiterate but smart Zane, twins Sludge and Widget, and the oldest Cora who has a grudge against Metro City. They accompanied by a dog-like waste disposal robot named Trashcan. Toby also meets the members of the Robot Revolutionary Front (RRF), Sparx, Robotsky, and Mike the Fridge, who wish to free robots from mankind's control but are very inept and bound by the Laws of Robotics. However, they give Toby a new name, calling him "Astro". Astro departs with the kids, finding people...
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The answer is:
Who tells Astro that if the cores reunite, they will be destroyed?