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

[Q]: Compounds with metals and nonmetals sharing electrons are known as ions kinds of compounds.
[A]: Compounds with metals and nonmetals sharing electrons are known as what kinds of compounds?


[Q]: A vapor light produces visible light by electroluminescence process.
[A]: A vapor light produces visible light by what process?


[Q]: Proteins are the most numerous and diverse biochemical compounds.
[A]:
What are the most numerous and diverse biochemical compounds?