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

[EX Q]: Carried through body happens if cancer cells enter the blood stream.
[EX A]: What happens if cancer cells enter the blood stream?

[EX Q]: Warm and humid temperature and moisture conditions describe an air mass that originates over the atlantic ocean near the equator.
[EX A]: Which temperature and moisture conditions describe an air mass that originates over the Atlantic Ocean near the equator?

[EX Q]: Nearly five million people die yearly due to air pollution.
[EX A]:
Nearly how many millions of people die yearly due to air pollution?