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

Ex Input:
Moving air masses is the main reason for weather change.

Ex Output:
What is the main reason for weather change?

Ex Input:
Potential energy type of energy is possessed by autumn leaves before they fall.

Ex Output:
What type of energy is possessed by autumn leaves before they fall?

Ex Input:
Dew forming on plants during a cold night is an example of water condensing.

Ex Output:
Which is an example of water condensing?