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

Example Input: You call the hard case that surrounds the soft parts of some animals the exoskeleton.
Example Output: What do you call the hard case that surrounds the soft parts of some animals?

Example Input: A covalent network solid is a compound in which all of the atoms are connected to one another by covalent bonds.
Example Output: What is a compound in which all of the atoms are connected to one another by covalent bonds?

Example Input: Carbon dioxide chemically weather rocks by creating acids.
Example Output:
How does carbon dioxide chemically weather rocks?