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: Natural resource type of resource is limited in supply and cannot be replaced except over millions of years.

Answer: What type of resource is limited in supply and cannot be replaced except over millions of years?


Question: Darwin believed in gradualism.

Answer: Did darwin believe in punctuated equilibrium or gradualism?


Question: The energy in sunlight is also known as solar energy.

Answer:
The energy in sunlight is also known as what kind of energy?