In this task, you're given passages that contain mentions of names of people, places, or things. Some of these mentions refer to the same person, place, or thing. Your job is to write questions that evaluate one's understanding of such references. Good questions are expected to link pronouns (she, her, him, his, their, etc.) or other mentions to people, places, or things to which they may refer. Do not ask questions that can be answered correctly without understanding the paragraph or having multiple answers. Avoid questions that do not link phrases referring to the same entity. For each of your questions, the answer should be one or more phrases in the paragraph, and it should be unambiguous.

Example input: Passage: Nearing London, Oliver encounters Jack Dawkins, a pickpocket more commonly known by the nickname the "Artful Dodger", and his sidekick, a boy of a humorous nature named Charley Bates, but Oliver's innocent and trusting nature fails to see any dishonesty in their actions. The Dodger provides Oliver with a free meal and tells him of a gentleman in London who will "give him lodgings for nothing, and never ask for change". Grateful for the unexpected assistance, Oliver follows the Dodger to the "old gentleman's" residence. In this way Oliver unwittingly falls in with an infamous Jewish criminal known as Fagin, the gentleman of whom the Artful Dodger spoke. Ensnared, Oliver lives with Fagin and his gang of juvenile pickpockets in their lair at Saffron Hill for some time, unaware of their criminal occupations. He believes they make wallets and handkerchiefs.
Example output: Who believes Fagin's gang make wallets and handkerchiefs?.
Example explanation: This question is based on the following sentence in the passage "He believes they make wallets and handkerchiefs". It evaluates the understanding that the pronoun "he" refers to name "Oliver". You can ask questions like this one about most pronouns in a paragraph.
Q: Passage: American sailor David Martens, on shore leave in England, visits his brother Jack's grave. He meets fashion designer Sally Meadows, who by coincidence works with Jack's ex-fiancée, Diana, a model.
Successful stylist Kingsley Beauchamp and financial backer Madame Dupont own the company where Sally and Diana are employed. Expensive jewels are to be worn by Diana when she models a new dress, but Beauchamp hires two men, Costard and Podd, to break into a safe after hours and steal the gems.
Diana stumbles on the robbery and Costard kills her. He knocks David unconscious and decides to frame him for the theft, crashing a car with David inside, reporting it stolen and placing a ruby bracelet in David's pocket.
While the police make David a prime suspect, Beauchamp and Costard dispose of Diana's body and the diamonds. They decide to murder David after he suspects them, using gas, but Sally saves him.
Diana's body is found in a river. David goes to Beauchamp's home and discovers the missing dress worn by Diana. He knows that Beauchamp is about to fly to Amsterdam, so he hurries to the airport. Costard is there, being double-crossed while Podd smuggles the jewels on Beauchamp's behalf. The police arrive in time to arrest all three.
A:
Who frames the sailor?