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

Ex Input:
Sentence: A piece of toast heats up less when slid across a counter then when slid across a cutting board. Question: Which is the rougher surface?

Ex Output:
cutting board


Ex Input:
Sentence: Suppose you look into the sky. Question: Which star is easier to see?

Ex Output:
Sirius


Ex Input:
Sentence: John and Flora each head down the beach. John is walking while Flora is running. Question: Who makes it less far down the beach?

Ex Output:

John