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

Example Input: Air quality is a measure of pollutants in the air.
Example Output: Air quality is a measure of what in the air?

Example Input: Six many neutrons do 99% of carbon atoms have.
Example Output: How many neutrons do 99% of carbon atoms have?

Example Input: In humans, the heart is the first organ to form and become functional.
Example Output:
In humans, what is the first organ to form and become functional?