Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Q: In a carbon triple bond, three pairs of electrons are shared.

A: In a carbon triple bond, how many pairs of electrons are shared?
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Q: Atoms of metals are good conductors of electricity because they give up electrons.

A: Why are atoms of metals good conductors of electricity?
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Q: The energy stored in the organic molecules of food ultimately comes from the sun.

A:
The energy stored in the organic molecules of food ultimately comes from where?
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