You are given a sentence and a question. You're expected to write the correct answer based on the sentence.
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Question: Sentence: A chain gets hotter when dragged across a garage floor then when dragged across a road. Question: Which surface forces the chain to experience more friction?

Answer: garage floor


Question: Sentence: Bob ran his hand over his girlfriends legs. One leg was shaved and the other was stubbly. He noted that the shaved leg was much smoother. Question: Which leg caused more friction?

Answer: The stubbly leg


Question: Sentence: Bill Gates and Lebron James are playing a game of basketball.  Bill Gates is an old guy who doesn't work out, and Lebron James is a young sports adonis who trains daily.  Both stand at half court, but only one hits the backboard. Question: Who?

Answer:
Lebron James