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

Example Input: The values of strangeness assigned to various particles are based on decay systematics.
Example Output: The values of strangeness assigned to various particles are based on what?

Example Input: Starches are complex carbohydrates that are the polymers of glucose.
Example Output: What complex carbohydrates are the polymers of glucose?

Example Input: Earth revolves around the sun once per year of the following happens in our solar system.
Example Output:
Which of the following happens in our solar system?