Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: The energy stored in the organic molecules of food ultimately comes from the sun.

Answer: The energy stored in the organic molecules of food ultimately comes from where?


Question: Proteins are long chains of amino acids.

Answer: What are long chains of amino acids?


Question: Alkaline earth metals are silvery grey color.

Answer:
Alkaline earth metals are what color?