input question: Generate a question that has the following answer: A butcher knife for the following movie plot: Opening from his point of view, a murderer looks around the city of Amsterdam at night through the canals the city is famous for. He sneaks into a Chinese restaurant's backdoor and steals a butcher knife while the cooks aren't looking. The killer finds his first victim in a local prostitute who, after refusing advances from a cab driver, gets thrown out of the cab. A baglady watches from a distance as the killer plunges the knife into the hooker and drags her back into the water. The next morning, a tour boat on the canal collides with the body of the prostitute, who has been hung on one of the small bridges. As the tourists scream, the body drags on the top of the boat until an opening shows her bloodied body and face. Assigned to the case is detective Eric Visser, a hard-boiled detective who is raising his 13-year-old daughter Anneke after a split from his ex. He spends an hour in a bath, comes home late from work, and tends to drink now and again. Nevertheless, Eric is praised as one of the best detectives on the force. His partner, Vermeer, meets Eric at the site where the body was found with fellow cop Potter attempting to get through to the baglady, who tells Eric that it was a monster who killed the prostitute and that it came out of the water. That night, two environmentalists are taking water samples in an ongoing investigation against a nearby chemical plant. However, when the killer emerges, one of the men is taken underwater and when his partner attempts to grab the anchor, he is horrified to find the man's head on the anchor. Scared, the surviving environmentalist swims to the nearby shore and calls for help when he sees a truck pass by. As the truck driver comes out from a distance, the killer grabs the environmentalist and drags him back into the water. When Eric and Vermeer see the bodies of the environmentalists, he is convinced that there is a serial killer. Eric runs into John, an old friend from the police academy. John works for the river police and we learn that Eric's ex-girlfriend used...???
output answer: What did the killer use to kill the pristitute?

input question: Generate a question that has the following answer: Yes, they are boyfriend and girlfriend. for the following movie plot: During Christmas 1955, an 11-year-old Hellboy is told a bedtime story by his adoptive father, Trevor Bruttenholm, involving an ancient war between human and magical creatures, started by human's greed. After defeat of the magical creatures' forces, the master of the goblin blacksmiths offers to build an indestructible mechanical army for the elven King Balor. Encouraged by his son Prince Nuada, Balor orders the building of this Golden Army. The humans are devastated by the army. Balor is ridden with guilt and forms a truce with the humans: Man will keep his cities and the magical creatures will keep their forests. Nuada does not agree with the truce and leaves in exile. The magical crown controlling the army is broken into three pieces, one going to the humans and the other two kept by the elves. In the present, Nuada declares war on humanity. He collects the first piece of the crown from an auction, killing everyone at the site by unleashing tooth fairies, and kills his father for the second piece. His twin sister, Princess Nuala, escapes with the final piece. Meanwhile, Hellboy is having issues with his girlfriend Liz, and trouble accepting that their organization, the B.P.R.D. must remain undercover. Investigating the auction slaughter, Hellboy allows himself to be revealed to the world. In the commotion, Abe Sapien discovers Liz is pregnant; she swears him to secrecy as she ponders keeping the child. Furious at Hellboy's actions, the Bureau's superiors send a new B.P.R.D. agent, the ectoplasmic medium Johann Krauss, to take command. With Krauss in charge, the team tracks the tooth fairies to the troll market, an enormous city hidden under the Brooklyn Bridge. Abe stumbles onto Nuala, who has obtained a map leading to the Golden Army, and falls in love with her. She is brought under B.P.R.D. protection following an attack by Nuada's sidekick, the troll Wink, and an elemental forest god, both of which Hellboy kills. During the fight, Hellboy is questioned by Nuada whether it is right to fight for the humans...???
output answer: Hellboy and Lizare related?

input question: Generate a question that has the following answer: Trelkovsky? for the following movie plot: Trelkovsky (Roman Polanski), a quiet and unassuming man, rents an apartment in Paris whose previous tenant, Egyptologist Simone Choule, attempted to commit suicide by throwing herself out the window and through a pane of glass below. He visits Choule in the hospital but finds her entirely in bandages and unable to talk. Whilst still at Choule's bedside, Trelkovsky meets Simone's friend, Stella (Isabelle Adjani), who has also come to visit. Stella begins talking to Simone, who becomes aware of her visitors. Initially showing some signs of agitation upon seeing them, Choule soon lets out a disturbing cry, then dies. It isn't clear which of the two has caused this reaction. Apparently unaware that Choule is now dead, Trelkovsky tries to comfort Stella but dares not say that he never knew Simone, instead pretending to be another friend. They leave together and go out for a drink and a movie (1973's Enter The Dragon), where they fondle each other. Outside the theatre they part ways. As Trelkovsky occupies the apartment he is chastised unreasonably by his neighbors and landlord, Monsieur Zy (Melvyn Douglas), for hosting a party with his friends, apparently having a woman over, making too much noise in general, and not joining in on a petition against another neighbor. Trelkovsky attempts to adapt to his situation, but is increasingly disturbed by the apartment and the other tenants. He frequently sees his neighbors standing motionless in the toilet room (which he can see from his own window), and discovers a hole in the wall with a human tooth stashed inside. He receives a visit and a letter from one Georges Badar (Rufus), who secretly loves Simone and has believed her to be alive and well. Trelkovsky updates and comforts the man and spends the night out with him. Gradually he changes his breakfast habits to those of Simone, and shifts from Gauloises to Marlboro cigarettes. Trelkovsky becomes severely agitated and enraged when his apartment is robbed, while his neighbors and the concierge (Shelley Winters) continue...???
output answer:
Who makes the suicide attempt?