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

[EX Q]: Sentence: Vicky tried to bend a rubber tube into a circle. She then tried to do the same thing with a glass tube. One of them bent into a circle and the other one broke. Question: Which one did she successfully bend into a circle?
[EX A]: the rubber tube

[EX Q]: Sentence: A halter sliding across a barn floor gets hotter then one sliding across a field. Question: Which surface forces the halter to travel at a lower rate of speed?
[EX A]: barn floor

[EX Q]: 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?
[EX A]:
the train