Given the task definition, example input & output, solve the new input case.
In this task, you will be shown an extract from a movie plot. You need to read the extract and create questions that can be answered from the extract. The questions should be well-formed and grammatically correct. The questions should be completely answerable from the given passage and should not require any external knowledge. Subjective questions are not allowed. Create questions that result in factoid answers. A simple rule of thumb to decide whether a question is factoid or not is to see if two different people with average reading/comprehension skills would come up with the same answer after reading the passage.
Example: Twenty-year-old Will Hunting of South Boston is a self-taught, genius-level intellect, though he works as a janitor at the Massachusetts Institute of Technology and spends his free time drinking with his friends, Chuckie (Ben Affleck), Billy (Cole Hauser) and Morgan (Casey Affleck). When Professor Gerald Lambeau (Stellan Skarsgård) posts a difficult mathematics problem as a challenge for his graduate students, Will solves the problem anonymously, stunning both the graduate students and Lambeau himself. As a challenge to the unknown genius, Lambeau posts an even more difficult problem. Lambeau chances upon Will solving the problem but Will flees the scene. That night at a bar, Will meets Skylar (Minnie Driver), a British student about to graduate from Harvard, who plans on attending medical school at Stanford and gives Will her phone number before leaving.
Output: How old is Will Hunting in the movie ?
This is a good question which has a factoid answer.

New input case for you: Doug and Helen Stilwin (Barry Sullivan and Barbara Stanwyck) along with their son Bobby (Lee Aaker) embark on a vacation into desolate Baja California in Mexico to a remote, deserted fishing spot along the coast that her father used to frequent with his old military buddies. At a roadside barricade heading into the Baja outback, they are inspected by police but are not told about an American killer who has escaped from prison and is at large in the area.Upon arrival at the secret fishing spot, young Bobby goes exploring out onto a precarious, rotting jetty high above the water. His foot gets stuck in a crack between boards, and when Doug gets him out, the jetty collapses and a wooden piling falls on Doug's leg and traps him on the beach just as the tide is coming in. Helen nearly succeeds in lifting the piling with their car jack, until the jack breaks. They quickly determine that if Doug is not freed within a few hours, he will drown in the rising surf.Helen leaves with the family car in an attempt to find help. She comes across a family of Mexican ranchers, but the language barrier prevents them from realizing that she is looking for rope until she is far gone. Helen then comes across a small house and finds rope, but seemingly out of nowhere, a man (Ralph Meeker) appears. Helen asks for help and the man gets in the car, but around the corner of the house, it is revealed that the man just killed a worker, and is the fugitive, Lawson, the police are looking for. He takes her hostage, and threatens to kill her if she reveals to the police that he is the fugitive.Meanwhile, the rising tide back at the jetty causes Doug to have a heart-to-heart with Bobby, telling him he is proud of his son and hopes he will face the challenges ahead with strength. A boat passes close to their location, and shouts are exchanged, but thinking the family is just tourists on a beach outing, the boat crew does not stop.Lawson runs through a police roadblock, and eventually blows out a tire. As he attempts to change the tire, Helen tries to hit Lawson and flee, but he catches her. Another police car catches up with them, but Lawson's driving forces the police off the road and the police car flips and kills the officers. Lawson hides out in an abandoned house to wait for the police to pass. While there, in an act of desperation and steely resolve, Helen offers to consummate with Lawson and go with him if that means saving her husband. Lawson, having just escaped from prison, takes her up on the offer, and the two show up to help Doug just as the tide is rising over Doug. Lawson latches the fallen piling to the family car bumper and tries to pull the piling loose, but this tactic is unsuccessful. Ultimately, Lawson uses a plank to wedge the piling off Doug, saving his life.Helen offers to hold up her end of the bargain and leave with Lawson â thus giving him a pretext to escape as a couple â but he sees the goodness in her and escapes in the car alone. However, he turns back when he hears police sirens, and Lawson and Helen share an understanding handshake as he escapes on foot down the rocky coastline.
Output:
Why does Helen leave the family car?