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

Sentence: Teenage Mary and her grandmother, Millie, are both gymnasts. Both are talented athletes, even though Millie is getting a little stiff in her later years. Question: Between senior Millie and young Mary, which one is more at risk for broken bones?
Millie is more at risk

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?
frozen lake

Sentence: Tim and Mary's parents are in a shouting match. Tim is down the block getting ice cream, while his sister Mary is sitting in her bedroom. Question: Who will the yelling be loudest for?

Mary