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.

Example Input: Question: Fires, mainly caused by what, are a natural disturbance in temperate grasslands? Answer: lightning
Example Output: Fires, mainly caused by lightning, are a natural disturbance in temperate grasslands.

Example Input: Question: Exposure to what can increase the amount of pigment in the skin and make it appear darker? Answer: ultraviolet radiation
Example Output: Exposure to ultraviolet radiation can increase the amount of pigment in the skin and make it appear darker.

Example Input: Question: What is the term for the affected factor in an experiment? Answer: dependent variable
Example Output:
Dependent variable is the term for the affected factor in an experiment.