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

[Q]: During the first year after birth, a baby called a(n) infant.
[A]: During the first year after birth, what is a baby called?


[Q]: Stringed instruments can help show the relationship between tension and frequencies in strings.
[A]: Stringed instruments can help show the relationship between tension and what in strings?


[Q]: Respiratory acidosis is considered to be problematic because excess co2 in blood.
[A]:
Why is respiratory acidosis considered to be problematic?