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

Example Input: Negative growth rate results when birth rates fall even lower than death rates.
Example Output: What results when birth rates fall even lower than death rates?

Example Input: All life is built around the element carbon.
Example Output: What element is all life built around?

Example Input: Antibodies recognize and combine with harmful materials, including both toxic chemicals and invasive microorganisms.
Example Output:
Which proteins recognize and combine with harmful materials, including both toxic chemicals and invasive microorganisms?