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

Example Input: Pleiotropic effects causes symptoms associated with sickle-cell disease.
Example Output: What causes symptoms associated with sickle-cell disease?

Example Input: Windchill describes what the temperature feels like when the wind is taken into account.
Example Output: What weather term describes what the temperature feels like when the wind is taken into account?

Example Input: There is very little direct sunlight on cloudy days is it more difficult to see your shadow on a cloudy day than on a sunny day.
Example Output:
Why is it more difficult to see your shadow on a cloudy day than on a sunny day?