Given a context passage, generate a question from the passage such that its answer is shortest continous span from the passage.

Example Input: Oil is a liquid fossil fuel that is extremely useful because it can be transported easily and can be used in cars and other vehicles. Oil is currently the single largest source of energy in the world. Oil from the ground is called crude oil, which is a mixture of many different hydrocarbons. Crude oil is a thick dark brown or black liquid hydrocarbon. Oil also forms from buried dead organisms, but these are tiny organisms that live on the sea surface and then sink to the seafloor when they die. The dead organisms are kept away from oxygen by layers of other dead creatures and sediments. As the layers pile up, heat and pressure increase. Over millions of years, the dead organisms turn into liquid oil. In order to be collected, the oil must be located between a porous rock layer and an impermeable layer (Figure 1.1). Trapped above the porous rock layer and beneath the impermeable layer, the oil will remain between these layers until it is extracted from the rock. Oil (red) is found in the porous rock layer (yellow) and trapped by the impermeable layer (brown). The folded structure has allowed the oil to pool so a well can be drilled into the reservoir. To separate the different types of hydrocarbons in crude oil for different uses, the crude oil must be refined in refineries like the one shown in Figure 1.2. Refining is possible because each hydrocarbon in crude oil boils at a different temperature. When the oil is boiled in the refinery, separate equipment collects the different compounds. Most of the compounds that come out of the refining process are fuels, such as gasoline, diesel, and heating oil. Because these fuels are rich sources of energy and can be easily transported, oil provides about 90% of the energy used for transportation around the world. The rest of the compounds from crude oil are used for waxes, plastics, fertilizers, and other products. Gasoline is in a convenient form for use in cars and other transportation vehicles. In a car engine, the burned gasoline mostly turns into carbon dioxide and water vapor. The fuel releases most of its energy as heat, which causes the gases to expand. This creates enough force to move the pistons inside the engine and to power the car. Refineries like this one separate crude oil into many useful fuels and other chemi- cals. Click image to the left or use the URL below. URL: The United States does produce oil, but the amount produced is only about one-quarter as much as the nation uses. The United States has only about 1.5% of the worlds proven oil reserves, so most of the oil used by Americans must be imported from other nations. The main oil-producing regions in the United States are the Gulf of Mexico, Texas, Alaska, and California (Figure As in every type of mining, mining for oil has environmental consequences. Oil rigs are unsightly (Figure 1.4), and spills are too common (Figure 1.5). Click image to the left or use the URL below. URL: Offshore well locations in the Gulf of Mex- ico. Note that some wells are located in very deep water. Drill rigs at the San Ardo Oil Field in Monterey, California.
Example Output: crude oil is a mixture of many different

Example Input: Robert Edward Chambliss (January 14, 1904 -- October 29, 1985), also known as Dynamite Bob, was convicted in 1977 of murder for his role as conspirator in the 16th Street Baptist Church bombing in 1963.
Example Output: Which crime led to the conviction of Robert Edward Chambliss?

Example Input: The film opens as Alice Melbourne and Judson Ellis arrive at a California Municipal Airport by taxi. Alighting from the cab they tip the driver generously, bribing him to not say anything to anyone about them. Alice and Judson check the departure sign for The Silver Queen, heading for Panama City, Panama, and seem excited and anxious.Also waiting for the same flight is Peggy Nolan, to whom a delivery of expensive flowers is made with a card thanking her for some favor. Peggy disdainfully tosses the card in the trash and gives the flowers to a woman selling cheap gardenias.Soon after, the flight gets ready to leave and we are introduced to Professor and Mrs. Spengler, an elderly couple, and Joe, the flight's co-pilot, who is immediately attracted to Alice. Mrs. Spengler is a domineering woman, but her husband seems content to be bossed around like a child.As they wait on the tarmac near the 'plane a car drives up and a well dressed man emerges with a young boy and another man. The boy is Tommy and he is being sent away with "Uncle" Pete until his father -- a mobster -- can follow later.As the passengers board, Bill, the pilot, receives word that they will be transporting an anarchist back to Panama, but he assures the group there is nothing to worry about since the man will be in custody during the flight. The prisoner is Vasquez, and is being accompanied by a bounty hunter named Crimp.After Larry the steward helps everyone get settled, the flight departs with its twelve souls aboard. Bill and Joe discuss plans for the layover and Joe indicates he has an interest in Alice. He goes back to the passenger compartment where beds have been made up and people are turning in for the night -- except for Crimp who plans to stay up and make sure Vasquez doesn't "go for a walk" -- thus cheating the hangman and himself out of $5,000.Pete tucks his young charge in for the night and helps him say his prayers (something Pete is unfamiliar with). Peggy comes up to the cockpit to visit with Bill, whose rudeness finally makes it clear that he wants nothing to do with her. When Alice rings for the steward, Joe takes the call and makes a play for her.Next morning the 'plane arrives for a refueling stop in Mexico and the passengers have breakfast. Joe continues to pursue Alice, under the assumption that she is Judson's secretary. Peggy makes another stab at getting Bill to warm to her and is rebuffed again. Then Pete tells her that her help isn't needed when she tries to get Tommy to drink his milk. Peggy's been "marked" as a loose woman by her fellow travelers who want nothing to do with her.Before boarding the 'plane a reporter confronts Judson and Alice and Joe learns that she is engaged to her "boss" and they are eloping.As the flight continues and heads into stormy weather the Professor discusses the methods by which a South American tribe of headhunters practice their craft. The conversation is interrupted by a news bulletin which recounts how Tommy's father has been killed. Peggy again tries to help with Tommy, saying "he needs a woman." But Pete is still being judgemental and answers "he needs a lady." Mrs. Spengler intervenes and comforts Tommy.As the storm they are flying through gets rougher, the passengers strap themselves into their seats and Crimp insists the pilots turn back. As the 'plane rocks back and forth a couple of metal cylinders break loose and crash through the back door. Tommy comes perilously close to going out the door when Llarry saves him and hands him to Pete. Just then the 'plane dips sharply and Larry is tossed out the door to his death. As Joe and Bill try to steady the 'plane Crimp tries to force them to turn back by waving his gun at them. In the struggle the gun goes off and is picked up by Vasquez.With a damaged engine the Silver Queen crashes, and all eleven on board survive. The next morning Joe and Bill admit to the professor that they were blown off
Example Output:
With what does Vasquez threaten the other characters with?