instruction:
You are given a sentence and a question. You're expected to write the correct answer based on the sentence.
question:
Sentence: Tom and Jim are brothers.  Tom is thirteen and Jim is six.  Tom is much bigger.  They go out to throw rocks at the lake. Question: Who can throw them farther?
answer:
Tom


question:
Sentence: Yolanda was driving, and she turned onto a road that ran alongside some railroad tracks. A train was moving down the tracks, going in the same direction that she was. A few minutes later, the train had passed by her and she could only see the back of the train. Question: Which vehicle had a greater rate of speed?
answer:
the train


question:
Sentence: Bob ran his hand over his girlfriends legs. One leg was shaved and the other was stubbly. He noted that the shaved leg was much smoother. Question: Which leg caused more friction?
answer:

The stubbly leg