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

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: Molar masses can be used to determine the mass of a quantity of material.

Output: What can be used to determine the mass of a quantity of material?


Input: Consider Input: Zeros that appear in front of all of the nonzero digits are called left-end zeros.


Output: Zeros that appear in front of all of the nonzero digits are called what?