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

Example Input: Mechanical waves term describes waves that travel through matter.
Example Output: What term describes waves that travel through matter?

Example Input: Eukaryotic cell division involves mitosis and cytokinesis.
Example Output: Eukaryotic cell division involves mitosis and what?

Example Input: Molecules of gas are rare in exosphere outermost region of the planet's atmosphere.
Example Output:
Molecules of gas are rare in what outermost region of the planet's atmosphere?