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: The concentration of hydrogen ions in a solution is called? Answer: acidity
Example Output: The concentration of hydrogen ions in a solution is called acidity.

Example Input: Question: Vertical layering is an important feature of the terrestrial type of what kind of community? Answer: biome
Example Output: Vertical layering is an important feature of the terrestrial type of biome kind of community.

Example Input: Question: What happens to the mass number during a nuclear decay process by positron emission? Answer: remains unchanged
Example Output:
Remains unchanged happens to the mass number during a nuclear decay process by positron emission.