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: Hydras and sea anemones are examples of apolyp.

Answer: Hydras and sea anemones are examples of what form?


Question: Cloudy conditions will most likely result from a low-pressure weather system.

Answer: Which will most likely result from a low-pressure weather system?


Question: Superconductors are materials with a resistivity of zero.

Answer:
Superconductors are materials with a resistivity of?