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 Input:
Question: What is the energy called that is stored in matter? Answer: potential

Ex Output:
The energy that is stored in matter is called potential.

Ex Input:
Question: What play an important role in the modulation of the nuclear chain reaction? Answer: control rods

Ex Output:
Control rods play an important role in the modulation of the nuclear chain reaction.

Ex Input:
Question: How many membranes form the mitochondrion structure of a cell? Answer: two

Ex Output:
Two membranes form the mitochondrion structure of a cell.