TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: A vapor light produces visible light by electroluminescence process.

SOLUTION: A vapor light produces visible light by what process?

PROBLEM: A frog develops (a/an) lungs as it changes from a tadpole to an adult frog.

SOLUTION: Which of the following structures does a frog develop as it changes from a tadpole to an adult frog?

PROBLEM: Carbonic acid can dissociate into hydrogen carbonate ions and protons.

SOLUTION:
Carbonic acid can dissociate into hydrogen carbonate ions and what?