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.

[EX Q]: Question: What type of device uses electromagnetic induction to change the voltage of electric current? Answer: electronic transformer
[EX A]: A electronic transformer uses electromagnetic induction to change the voltage of electric current.

[EX Q]: Question: Most of the energy used by living things comes either directly or indirectly from what? Answer: the sun
[EX A]: Most of the energy used by living things comes either directly or indirectly from the sun.

[EX Q]: Question: Time, mass, length, and temperature are considered to be what kinds of units? Answer: base
[EX A]:
Time, mass, length, and temperature are considered to be base units.