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

Ex Input:
Sentence: Billy and Cody are walking together.  Cody gets tired and sits on a park bench. Question: When they leave the park together, who has walked farther?

Ex Output:
Billy


Ex Input:
Sentence: Jasper is carrying his nephew in the park.  Then it's his niece's turn.  His niece is five years older and weighs more. Question: Who has more of a gravity pull?

Ex Output:
the niece


Ex Input:
Sentence: Flash the superhero is the fastest man in the world. He races a bear. Question: Who wins this race?

Ex Output:

Flash