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

Example Input: Sentence: A model car rolling across a desk is experiencing more friction then one rolling across a display case. Question: Which surface will give the model car a rougher ride?
Example Output: desk

Example Input: Sentence: A boy slid in the mud, after walking across the grass yard with no problem. Question: Which had more resistance?
Example Output: grass

Example Input: Sentence: Sina and Kim work together. Sina is driving a sports car to work while Kim rides her bike to work. Question: After an hour, who would have gone less distance?
Example Output:
Kim