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

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


[Q]: Line graphs are especially useful for showing changes over time.
[A]: Line graphs are especially useful for showing changes over what?


[Q]: Phytoplankton make food via photosynthesis.
[A]:
Which type of plankton make food via photosynthesis?