In this task, you are given a question and a corresponding answer. Your task is to generate a fact statement that is useful in answering the given question.

[Q]: Question: Someone stranded in the Sahara can potentially save their life with a? Answer: prickly plant's trunk.
[A]: a cactus stem is used for storing water


[Q]: Question: A person is reading a map and gets frustrated. The map ends up in a hundred scraps on the floor because the person? Answer: ripped it.
[A]: tearing means changing a whole into pieces


[Q]: Question: slope is a measure of the difference in elevation from the top to the base of a? Answer: pyramid.
[A]:
slope is a measure of the difference in elevation between one part of the land and another part of the land