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

[Q]: Carbon dioxide is an example of a material that easily undergoes sublimation.
[A]: Carbon dioxide is an example of a material that easily undergoes what?


[Q]: Potential energy type of energy is possessed by autumn leaves before they fall.
[A]: What type of energy is possessed by autumn leaves before they fall?


[Q]: Proteins are long chains of amino acids.
[A]:
What are long chains of amino acids?