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: Proteins are long chains of amino acids.

Answer: What are long chains of amino acids?


Question: Superior sagittal sinus is the largest of the sinuses.

Answer: What is the largest of the sinuses?


Question: Like the energy content in food, the energy expenditures of exercise are also reported in kilocalories units.

Answer:
Like the energy content in food, the energy expenditures of exercise are also reported in what units?