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

[EX Q]: Cloudy conditions will most likely result from a low-pressure weather system.
[EX A]: Which will most likely result from a low-pressure weather system?

[EX Q]: Water and humidity is the critical factor for the survival of segmented worms.
[EX A]: What is the critical factor for the survival of segmented worms?

[EX Q]: The element sulfur has the atomic number 16.
[EX A]:
What element has the atomic number 16?