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

Input: Consider Input: Seismologists originally measured the intensity of an earthquake with the mercalli scale.

Output: How did seismologists originally measure the intensity of an earthquake?


Input: Consider Input: Injuries can be prevented by getting proper rest and recovery.

Output: Injuries can be prevented by getting proper what?


Input: Consider Input: Pangaea began breaking apart 250 million years ago.
Output: How many millions of years ago did pangaea begin breaking apart?