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

Example Input: There are three quarks in each proton and neutron.
Example Output: How many quarks are in each proton and neutron?

Example Input: The metallic bond is responsible for the properties of metals.
Example Output: What is responsible for the properties of metals?

Example Input: Alpha emission is a type of radioactivity.
Example Output:
Alpha emission is a type of what?