Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Example Input: Urea is made in the liver and excreted in urine.
Example Output: What is made in the liver and excreted in urine?

Example Input: A wall of rocks or concrete a called a groin.
Example Output: What is a wall of rocks or concrete called?

Example Input: Nitrogen is the most prevalent gas in the atmosphere, but not the most vital for life.
Example Output:
What is the most prevalent gas in the atmosphere, but not the most vital for life?