Given the task definition, example input & output, solve the new input case.
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: 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.
Output: Who believes Fagin's gang make wallets and handkerchiefs?.
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.

New input case for you: Passage: Jim works as a car mechanic with Jerry on a car for Keller which turns out to be bulletproof. One night while Keller and his gang buy champagne from a convenience store, Jim arrives using Keller's car robs the convenience store. However, as Jim was about to flee in Keller's car a police car arrives. The officer aims his gun at Jim demanding him to get out the car and opens fire on him. But the bullets are not effective on the windshield and Jim taunts the officer and drives away. Another police car attempts to corner him, but he easily overtakes it and escapes. The next day Jim is then confronted by Keller and his gang about the incident the night before. They order him to bring the bulletproof car to his house. After Keller and his gang left, Jerry lectures him as he was about to deliver Keller's car. While on the way, Jim stops at a car wash where he meets Gem and she's being led away by her boyfriend. Jim finally arrives at Keller's house and hands Keller the keys of his car and orders him to get the Ferrari 328 GTS from a couple in the mountains.
Output:
Who backs up Keller's demand that Jim deliver his car?