Given a question and a context passage, generate the answer having the word or phrase from the context passage. Here, the answer should be a shortest continous span from the passage.

[Q]: Context: A machine is any device that makes work easier by changing a force. When you use a machine, you apply force to the machine. This force is called the input force. The machine, in turn, applies force to an object. This force is called the output force. Recall that work equals force multiplied by distance: Work = Force Distance The force you apply to a machine is applied over a given distance, called the input distance. The force applied by the machine to the object is also applied over a distance, called the output distance. The output distance may or may not be the same as the input distance. Machines make work easier by increasing the amount of force that is applied, increasing the distance over which the force is applied, or changing the direction in which the force is applied. Contrary to popular belief, machines do not increase the amount of work that is done. They just change how the work is done. So if a machine increases the force applied, it must apply the force over a shorter distance. Similarly, if a machine increases the distance over which the force is applied, it must apply less force. Examples of machines that increase force are doorknobs and nutcrackers. Figure 16.8 explains how these machines work. In each case, the force applied by the user is less than the force applied by the machine, but the machine applies the force over a shorter distance. Examples of machines that increase the distance over which force is applied are paddles and hammers. Figure 16.9 explains how these machines work. In each case, the machine increases the distance over which the force is applied, but it reduces the strength of the applied force. Some machines change the direction of the force applied by the user. They may or may not also change the strength of the force or the distance over which it is applied. Two examples of machines that work in this way are claw hammers and the rope systems (pulleys) that raise or lower flags on flagpoles. Figure 16.10 explains how these machines work. In each case, the direction of the force applied by the user is reversed by the machine. How does this make it easier to do the job? An exoskeleton suit may seem like science fiction, turning ordinary humans into super heroes. But wearable robots are moving forward into reality. And for paraplegics, the ability to stand and walk that these machines provide is a super power. QUEST meets Austin Whitney and Tamara Mena, two "Exoskeleton Test Pilots" who are now putting this new technology through its paces. For more information on exoskeleton suits, see [Link] MEDIA Click image to the left or use the URL below. URL: You read above that machines do not increase the work done on an object. In other words, you cant get more work out of a machine than you put into it. In fact, machines always do less work on the object than the user does on the machine. Thats because all machines must use some of the work put into them to overcome friction. How much work? It depends on the efficiency of the machine. Efficiency is the percent of input work that becomes output work. It is a measure of how well a machine reduces friction. Consider the ramp in Figure 16.11. Its easier to push the heavy piece of furniture up the ramp to the truck than to lift it straight up off the ground. However, pushing the furniture over the surface of the ramp creates a lot of friction. Some of the force applied to moving the furniture must be used to overcome the friction. It would be more efficient to use a dolly on wheels to roll the furniture up the ramp. Thats because rolling friction is much less than sliding friction. As a result, the efficiency of the ramp would be greater with a dolly. Efficiency can be calculated with the equation: Efficiency = Output work 100% Input work Consider a machine that puts out 6000 joules of work. To produce that much work from the machine requires the user to put in 8000 joules of work. To find the efficiency of the machine, 
 Question: force applied by a machine
[A]: output force


[Q]: Context: New England, the late 1950s. Todd Anderson (Ethan Hawke), a lonely and painfully shy teenager, who is under pressure by his stern parents because he must live up to his older brother's reputation to attend Yale and become a lawyer, arrives for the new semester at the Welton Academy for boys -- Todd's brother also attended Welton and was a popular and well-regarded student there. This semester begins during an orientation gathering with a speech given by the stern Headmaster Nolan (Norman Lloyd), who states the academy's four pillars: Tradition, Honor, Discipline, and Excellence. Todd meets Neil Perry (Robert Sean Leonard) an ambitious student whom becomes his dorm roommate.Later in his dorm, Neil is ordered by his grumpy and domineering father (Kurtwood Smith) to drop his involvement with the school annual in order to maintain good grades so the boy may become a doctor much as he has done. Neil is under pressure from his stern father's will. Also, Mr. Perry tells Neil that Mrs. Perry also wants him to become a doctor, which further worries the boy. A little later, Todd tells Neil that he is in a similar situation with his parents involving his older brother who also attended Welton a few years ago, graduated, and attended Yale Law School and became a lawyer and his parents want the exact same thing for him. But Todd does not have the courage to tell his parents that he instead wants to be a writer, not a lawyer.During the first day of classes Todd and Neil experience the various teaching methods which include speeches by the trig teacher, as well as the Latin teacher, and the math teacher who states that "all 20 questions at the end of the first chapter are due tomorrow". In stark contrast to these orthodox teaching methods, the guys see a different side of the school when they attend English class taught by the newly arrived (and liberal-minded) Mr. Keating (Robin Williams), whom they met briefly during the orientation -- Keating tells his class he was also a student at Welton ("Helton" as the students secretly refer to the institution) himself many years ago. Keating enters his class whistling the 1812 Overture, and he first takes the boys out in the hallway to the school's displays cases containing artifacts of the school's sports achievements. He tells them that they all have the potential to become powerful individuals, and they are responsible for what their futures will hold. These two actions show his difference from the other teachers because no other teacher would commit the actions he does. Also, he tells the boys they may call him "Oh Captain, my Captain", if they dare. These examples of Mr. Keating's teachings show the boys how to think for themselves. Mr. Keating then tells the boys "Carpe Diem", which is Latin for "seize the day".In addition to Todd and Neil, a small group of other students whom include the lovesick Knox Overstreet (Josh Charles), the flip Charlie Dalton (Gale Hansen), the pragmatic Richard Cameron (Dylan Kussman), liberal Steven Meeks (Allelon Ruggiero) and the moderate Gerard Pitts (James Waterston), also react to the first day's lesson with comments from "that was weird" to "neat". Cameron asks if anything Keating told them will be on a future test and the boys respond with mild scorn.The next day Keating starts the class with a traditional teaching approach by having Neil read out loud the introduction to their poetry textbook, which describes how to rate the quality of poetry according to mathematical plotting. Keating finds such mathematical criticism ridiculous and instructs his pupils to rip out the essay which is one of three ways that he demonstrates freedom of expression and non-conformity. When some students hesitate, he tells them "this is not the Bible. This is a battle, a war. You will have to learn to think for yourselves." He later has the students stand on his desk as a reminder to look at the world in a different way.A few days later, Knox Overstreet is asked to attend a dinner party at the Danburry 
 Question: Who does Nolan warn?
[A]: todd anderson


[Q]: Context: Sofia Boutella (born April 3, 1982) is an Algerian-French dancer, actress and musician, known mainly for hip-hop and street dance, and from the Nike Women advertising campaigns. 
 Question: What is the language of Sofia Boutella?
[A]:
french