instruction:
You are given a sentence and a question. You're expected to write the correct answer based on the sentence.
question:
Sentence: A billiard ball has a greater mass then a basketball. Question: Which ball has a stronger field of gravity?
answer:
billiard ball


question:
Sentence: A cutting board is put over a metal sink. Sarah cuts some vegetables on the cutting board. The cutting board slides around. She moves the cutting board onto a wet dish rag on the counter. Then she cuts more vegetables. The cutting board doesn't slide around. Question: Which one of these sticks to the cutting board more safely?
answer:
wet dish rag


question:
Sentence: Jimbo knows that the surface of his coffee table isn't as rough as the surface of his floor. Question: When he slides his doily across both surfaces, which will force the doily to travel at a lower rate of speed?
answer:

floor