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

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?

Example Input: Water can be boiled to kill giardia and most other pathogens.
Example Output: Water can be boiled to kill giardia and most other what?

Example Input: Third conservation law of newton's laws states that the quantity of angular momentum in a closed system is fixed.
Example Output:
Which of newton's laws states that the quantity of angular momentum in a closed system is fixed?