Q: 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.
Passage: In the Mojave Desert, a policeman pulls over a 1964 Chevrolet Malibu driven by Dr. J. Frank Parnell. The policeman opens the trunk, sees a blinding flash of white light, and is instantly vaporized, leaving only his boots behind.
Otto Maddox, a young punk rocker in L.A., is fired from his job as a supermarket stock clerk. His girlfriend leaves him for his best friend. Depressed and broke, Otto is wandering the streets when a man named Bud drives up and offers him $25 to drive a car out of the neighborhood.
Otto follows Bud in the car to the Helping Hand Acceptance Corporation, where he learns that the car he drove was being repossessed. He refuses to join Bud as a "repo man," and goes to his parents' house. He learns that his burned-out ex-hippie parents have donated the money they promised him for finishing school to a crooked televangelist. He decides to take the repo job.
After repossessing a flashy red Cadillac, Otto sees a girl named Leila running down the street. He gives her a ride to her workplace, the United Fruitcake Outlet. On the way, Leila shows Otto pictures of aliens that she says are in the trunk of a Chevy Malibu. She claims that they are dangerous because of the radiation that they emit. Meanwhile, Helping Hand is offered a $20,000 bounty notice for the Malibu. Most assume that the car is drug-related, because the bounty is so far above the actual value of the car.
Parnell arrives in L.A. driving the Malibu, but he is unable to meet his waiting UFO compatriots because of a team of government agents led by a woman with a metal hand. When Parnell pulls into a gas station, Helping Hand's competitors, the Rodriguez brothers, take the Malibu. They stop for sodas because the car's trunk is so hot. While they are out of the car, a trio of Otto's punk friends, who are on a crime spree, steal the Malibu.
A:
Whose boots are left behind after vaporization?