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

Ex Input:
Rainfall weather phenomenon increases the rate of weathering in rock and soil.

Ex Output:
What weather phenomenon increases the rate of weathering in rock and soil?


Ex Input:
The human body has as many as two trillion lymphocytes, and lymphocytes make up about 25% of all of leukocytes.

Ex Output:
The human body has as many as two trillion lymphocytes, and lymphocytes make up about 25% of all of what?


Ex Input:
Thermosphere is the upper-most atmosphere.

Ex Output:

What is the upper-most atmosphere known as?