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

[Q]: The cardiovascular system in the human body consists of the heart, a network of blood vessels, and blood.
[A]: Which system in the human body consists of the heart, a network of blood vessels, and blood?


[Q]: You call a substance that is not an acid or a base neutral.
[A]: What do you call a substance that is not an acid or a base?


[Q]: Adaptive immunity term is used to describe an immunity that occurs after exposure to an antigen either from a pathogen or a vaccination.
[A]:
What term is used to describe an immunity that occurs after exposure to an antigen either from a pathogen or a vaccination?