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

Example Input: Lichens are not a single organism, but rather an example of a mutualism.
Example Output: Lichens are not a single organism, but rather an example of a what?

Example Input: The cerebellum of the brain lies under the cerebrum and behind the brain stem.
Example Output: What part of the brain lies under the cerebrum and behind the brain stem?

Example Input: Unlike ammonia, oxygen cannot be liquefied at room temperature because its critical temperature is below room temperature.
Example Output:
Unlike ammonia, oxygen cannot be liquefied at room temperature because its what is below room temperature?