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

Ex Input:
Atoms of metals are good conductors of electricity because they give up electrons.

Ex Output:
Why are atoms of metals good conductors of electricity?


Ex Input:
A desmosome is a cell structure that anchors the ends of cardiac muscle fibers together.

Ex Output:
A desmosome is a cell structure that anchors the ends of what fibers together?


Ex Input:
Prokaryotes were the first living things to evolve on earth.

Ex Output:

What were the first living things to evolve on earth?