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.

[Q]: Mitch and Dave are best friends who have grown up together. Their lives have taken different paths. Dave is a successful but stressed lawyer, husband and father of 3 children. Mitch, on the other hand, is a single man and responsibility-free.One night, after much drinking, they arrive at a fountain to urinate. They remark that they wish they had each others life. Unbeknownst to them, it is a wishing fountain. The next day, they awake to find that they are in each others body.Now living each others life, they soon discover that the grass is not greener. They go back to find the fountain, only to find that it has been moved. Stuck in their situation, Mitch needs to go to Dave's law firm with some important documents. Dave needs to attend a film shoot for Mitch, only to find that it is a softcore porn movie. They try their best to avoid messing up each others lives while they find a way back to their own.
[A]: How many children does Dave have?

[Q]: The film is set in 2020 and begins as the Ares spacecraft enters orbit around Mars. Andre Vishniac commands an international crew of seven astronauts. They try to land, but the small landing craft crashes as a result of an altimeter error. Vishniac is immediately killed, and five other crew members are stranded inside the toppled landing craft, unable to return to the waiting Ares mothercraft. With no spare landing craft, Lowell, the pilot of the Ares, returns to Earth with it.It will take 26 months for Lowell to send a rescue ship from Earth, but the stranded landing crew have supplies for less than a year and need to find ways to extend the life support system. The main problem is the thermoelectric power generator, since air and water recycling require electrical power. Since the lander is damaged beyond repair, it no longer requires fuel, and Sagan (the mission geologist) proposes to use what is left to power an improvised silicate reactor to produce methane and water vapor from the martian soil. They try to build it, but the landing engines and propellant tanks prove to be too damaged to salvage.The landing crew tries to find ways to save electrical power, but even draconian measures will only extend the life of the generator to fourteen months. The required lifetime can be attained only if the crew is reduced to two astronauts. Sanchez, the new commander, decides that she, Sagan and Rodrigo should abandon the craft, since their specialist skills are less important to the survival of the mission. They don their spacesuits and walk to the edge of the Valles Marineris valley, not far from the crash site. Recent radar scans from the orbiter reveal a maze-like structure hidden below a thick cloud of water vapor in the Valles Marineris. The structure appears artificial and is virtually identical to another one near the martian south pole. The three astronauts try to reach the bottom of the valley before they run out of oxygen.Sagan dies of asphyxiation, but Sanchez and Rodrigo stumble upon an artificial tunnel near the bottom of the valley, containing the mummified bodies of humanoid alien beings. They find that the air pressure and oxygen content in some of the tunnels is just like that on Earth. Rodrigo dies when accidentally entering a tunnel with no atmosphere, but Sanchez manages to contact the two astronauts still at the lander, who have meanwhile discovered that they are gradually losing air pressure and have realised that there must be an air leak somewhere. Sanchez urges them to join her, as there is enough oxygen and water in the valley for them to survive until the rescue ship arrives.
[A]: Who does Sanchez choose to abandon the craft?

[Q]: The characters drive to a remote location to hike at a site marked "Wilderness Trail". As they start, they see some other hikers passing by. After some walking, talking, and an impromptu foot race, they decide to head back. Before long, they realize that they are lost. That night, they build a campfire.Over the next couple of days, the two hikers wander through the wilderness without food or water. They try splitting up for a while, they try to retrace their steps, they try to follow some animal tracks, all to no avail. They grow increasingly irritated with each other as the situation becomes dire.They eventually find themselves slowly walking, mostly in silence, through a desert. They finally collapse due to fatigue and dehydration. The weaker of the two (Affleck) proclaims that he is "leaving", and reaches towards Damon's character. Damon's character rolls on top of Affleck and wordlessly strangles him before collapsing again.After some time, Damon's character awakens and realises that a highway is not far away. In the final sequence, he is badly sunburned but watches the passing landscape from the car of the father and son who have seemingly rescued him.
[A]:
What were they doing while walking?