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

Ex Input:
Carbon atoms have six neutrons as well as six protons.

Ex Output:
Carbon atoms have six neutrons as well as how many protons?


Ex Input:
Hydrocarbons compounds, which serve as fuels and are used in manufacturing, are called the driving force of western civilization.

Ex Output:
What compounds, which serve as fuels and are used in manufacturing, are called the driving force of western civilization?


Ex Input:
The refrigerator door contains iron of the following statements best explains why magnets usually stick to a refrigerator door.

Ex Output:

Which of the following statements best explains why magnets usually stick to a refrigerator door?