TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: The cerebellum of the brain lies under the cerebrum and behind the brain stem.

SOLUTION: What part of the brain lies under the cerebrum and behind the brain stem?

PROBLEM: A collapsing nebula leads to nuclear fusion process.

SOLUTION: A collapsing nebula leads to what process?

PROBLEM: Pleiotropic effects causes symptoms associated with sickle-cell disease.

SOLUTION:
What causes symptoms associated with sickle-cell disease?