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

[EX Q]: Sentence: Manny and Kevin want to travel cross country. Manny takes a plane and Kevin takes a car. Question: Who crosses the country first?
[EX A]: Manny

[EX Q]: Sentence: The Moon is less massive than the Earth. Question: On which would the gravity be lower?
[EX A]: Moon

[EX Q]: Sentence: A matchbox can slide across a greenhouse floor, but it doesn't move as fast as when it is slid across the backyard. Question: Which surface is the smoother one?
[EX A]:
greenhouse floor