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: Yeast fermentation causes holes in bread.

Answer: What causes holes in bread?


Question: Water affects the availability of oxygen important element in aquatic environments and in flooded soils.

Answer: Water affects the availability of what important element in aquatic environments and in flooded soils?


Question: The nucleus stores chromatin in the nucleoplasm.

Answer:
Where does the nucleus store chromatin ?