Task: Question Understanding
Input (English): Question: James and Jordan roll their cars across the carpeted living room floor. They notice that they are not moving as fast as they had when they played on the tiled kitchen floor. Which force is responsible for slowing down the cars? (A) Wind (B) Gravity (C) Thrust (D) Friction?
Output (English): roll, cars, carpeted, fast, tiled, floor., force, responsible, slowing