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: What is the name for a series of changes in the reproductive system of mature females that repeats every month on average? Answer: menstrual cycle
Example Output: Menstrual cycle is the name for a series of changes in the reproductive system of mature females that repeats every month on average.

Example Input: Question: Ultimately, most life forms get their energy from this? Answer: sun
Example Output: Ultimately, most life forms get their energy from the sun.

Example Input: Question: The first living cells may have evolved around how long ago? Answer: 4 billion years
Example Output:
The first living cells may have evolved around 4 billion years ago.