In this task, you are given a question and an answer, you would be asked to create the sentence based on the Question-Answer provided. It should be contained within the Question-Answer provided.

[Q]: Question: The cubic crystal system is composed of how many different types of unit cells? Answer: three
[A]: The cubic crystal system is composed of three many different types of unit cells.


[Q]: Question: Work is done only if a force is exerted in the direction of what? Answer: motion
[A]: Work is done only if a force is exerted in the direction of motion.


[Q]: Question: When vertebrate animals metabolize ammonia what is the primary byproduct that is produced? Answer: urea
[A]:
Urea vertebrate animals metabolize ammonia what is the primary byproduct that is produced.