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

[EX Q]: Aerobic exercise helps improve the cardiovascular system, while anaerobic exercise causes muscles to get bigger and stronger.
[EX A]: Aerobic exercise helps improve the cardiovascular system, while what exercise causes muscles to get bigger and stronger?

[EX Q]: Protist diseases in humans are caused by protozoa.
[EX A]: What type of diseases in humans are caused by protozoa?

[EX Q]: Jet streams are fast moving rivers of air that are going in opposite directions called.
[EX A]:
What are fast moving rivers of air that are going in opposite directions called?