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: You call materials that have high resistance to electric current electric insulators.

Answer: What do you call materials that have high resistance to electric current?


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: Compounds with aluminum and silicon are commonly found in the clay fractions of soils derived from volcanic ash.

Answer:
Compounds with aluminum and silicon are commonly found in the clay fractions of soils derived from what?