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

Input: Consider Input: Very low density is the concentration of gas molecules in the mesosphere.

Output: What is the concentration of gas molecules in the mesosphere?


Input: Consider Input: In a carbon triple bond, three pairs of electrons are shared.

Output: In a carbon triple bond, how many pairs of electrons are shared?


Input: Consider Input: 3 many elements are in the compound mg(oh)2.


Output: How many elements are in the compound Mg(OH)2?