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

Example Input: A(n) an ionic bond forms when the metal sodium gives up an electron to the nonmetal chlorine.
Example Output: What forms when the metal sodium gives up an electron to the nonmetal chlorine?

Example Input: Just as salty taste involves perception of sodium ions in saliva, sweet taste correlates with presence of glucose.
Example Output: Just as salty taste involves perception of sodium ions in saliva, what taste correlates with presence of glucose?

Example Input: If an air mass forms over an ocean it is called a maritime air mass.
Example Output:
If an air mass forms over an ocean it is called what type of air mass?