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

Ex Input:
Metallic bonds gives a coil of copper wire the ability to conduct electricity well.

Ex Output:
What gives a coil of copper wire the ability to conduct electricity well?


Ex Input:
A vapor light produces visible light by electroluminescence process.

Ex Output:
A vapor light produces visible light by what process?


Ex Input:
Crystals is used by sensitive systems to detect even low levels of radiation.

Ex Output:

What is used by sensitive systems to detect even low levels of radiation?