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

Example Input: Microscopes were first developed in the early 1600s by eyeglass makers.
Example Output: Microscopes were first developed in the early 1600s by this trade?

Example Input: Fires, mainly caused by lightning, are a natural disturbance in temperate grasslands.
Example Output: Fires, mainly caused by what, are a natural disturbance in temperate grasslands?

Example Input: You call the formation of a water vapor pocket cavitation.
Example Output:
What do you call the formation of a water vapor pocket?