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 a substance that is not an acid or a base neutral.

Answer: What do you call a substance that is not an acid or a base?


Question: The metallic bond is responsible for the properties of metals.

Answer: What is responsible for the properties of metals?


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

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