You are given a sentence, a question and two answer options ('A' and 'B'). Your task is to find the correct answer (return the string of the correct option, not 'A' or 'B') for the given question.

Example Input: Sentence: Franklin found that if he slides a turtle on its back across a pool table, it slides farther than if he were to slide the turtle across a pile of leaves. He realizes this because there is less resistance on the pool table. Question: The difference in the length that the turtle slides across both surfaces can be attributed to which surface being rougher? (A) pool table (B) pile of leaves
Example Output: pile of leaves

Example Input: Sentence: Tim has to push an ice sculpture across the ballroom in order to get his restaurant ready for a wedding. He notices that it is easier to push the sculpture when he moves it across the polished ballroom floor than when he moves it across the rough cobblestone floor. Question: If Tim is trying to keep the ice sculpture from melting, which surface should he push it across in order to produce less heat? (A) ballroom floor (B) cobblestone floor
Example Output: ballroom floor

Example Input: Sentence: A millipede and a centipede were walking along a trail at the same speed. The millipede stopped after 8 feet and the centipede kept going. Question: Which one spent less time walking? (A) the millipede (B) the centipede
Example Output:
the millipede