You are given a sentence and a question. You're expected to write the correct answer based on the sentence.

Sentence: John and Rita are going for a run. Rita gets tired and takes a break on the park bench. Question: After twenty minutes in the park, who has run farther?
John

Sentence: Mike rode his skateboard and his rollerblades one after the other. He rode them both at the same speed, but he rode the skateboard for a longer amount of time. Question: Which method made him travel the greater distance?
skateboard

Sentence: Karen was playing football at the park. She threw the ball and it hit the ground, rolled on the field, and then rolled into a gravel playground. The ball generated more heat when it rolled over the gravel. Question: Which surface is more level?
field