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

Example Input: Carbon 14 isotope of carbon is typically used to date ancient items.
Example Output: What isotope of carbon is typically used to date ancient items?

Example Input: Radioactive decay can give off energy and particles.
Example Output: Radioactive decay can give off energy and what else?

Example Input: Light is produced accelerate charged particles do what, frequently in the form of oscillating.
Example Output:
Light is produced when charged particles do what, frequently in the form of oscillating?