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 secreted before ejaculation to neutralize acidic urine remaining in the urethra? Answer: clear mucus
Example Output: Clear mucus is secreted before ejaculation to neutralize acidic urine remaining in the urethra.

Example Input: Question: The concentration of the hydrogen ion in a solution can be calculated when what is known? Answer: ph
Example Output: The concentration of the hydrogen ion in a solution can be calculated when the ph is known.

Example Input: Question: What type of chains do unsaturated fatty acids have? Answer: bent chains
Example Output:
Unsaturated fatty acids have bent chains.