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

[EX Q]: Tornadoes can occur in any.
[EX A]: At what time of the year can tornadoes occur?

[EX Q]: Water contains 3 atoms.
[EX A]: How many atoms does water contain?

[EX Q]: The name of film that polyester fibers form is mylar.
[EX A]:
What is the name of film that polyester fibers form?