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.

Ex Input:
Sentence: Milo knows that a frozen lake is smoother than a grass field. This means that when he slides his paper plane across one of the two surfaces it will experience less friction. Question: Which surface is that? (A) frozen lake (B) grass field

Ex Output:
frozen lake


Ex Input:
Sentence: Roni was playing with a beach ball at the beach. She noticed that when she rolled the ball on the sand, it traveled slower than when she rolled it on the wooden boardwalk. Question: Which surface provides more resistance? (A) sand (B) boardwalk

Ex Output:
sand


Ex Input:
Sentence: Ellen was an older woman with a daytime talk show, and Bruce was an older man who had starred in many action films.  He still worked out every day, while she merely ate many danishes.  One day, Bruce was on Ellen's show, and they decided to see who could throw a Frisbee further. Question: Who wasn't able to throw it as far? (A) Ellen couldn't throw it as far (B) Bruce couldn't throw it as far

Ex Output:

Ellen couldn't throw it as far