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

[Q]: Molar masses can be used to determine the mass of a quantity of material.
[A]: What can be used to determine the mass of a quantity of material?


[Q]: Three many families are known quarks divided into.
[A]: How many families are known quarks divided into?


[Q]: Starches are complex carbohydrates that are the polymers of glucose.
[A]:
What complex carbohydrates are the polymers of glucose?