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

[EX Q]: Sentence: Debbie was exercising with a giant exercise ball. It rolled out from under her and rolled on the frictionless gym floor. She retrieved it and started again, but this time it rolled onto a rough rubber mat. Question: Which surface was smoother?
[EX A]: gym floor

[EX Q]: Sentence: A stick of gum that is slid across a classroom desk travels pretty slow compared to a stick of gum that is pushed across a home office desk. Question: Which surface is the most rough?
[EX A]: classroom desk

[EX Q]: Sentence: A man's boat is about to sink, so he throws his food and boxes of stuff overboard. Question: At which point would his boat be faster?
[EX A]:
After the stuff is thrown overboard