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

Ex Input:
Diabetes is unpreventable in the type one form but may be prevented by diet if it is of the second type.

Ex Output:
What disease is unpreventable in the type one form but may be prevented by diet if it is of the second type?


Ex Input:
People stopped adding lead to gasoline because of environmental pollution.

Ex Output:
Why did people stop adding lead to gasoline?


Ex Input:
Instead of wood, some fireplaces use propane.

Ex Output:

Instead of wood, what do some fireplaces use?