The Problem Of Problem

I need the book,
(A specific one I know exists)
That deals with the problem
Of overpopulation.

I need a book,
(Does it exist?)
That deals with the problem
Of overpopulation.

I have a book
That deals with the problem
Of overpopulation.


I am looking for a woman
(I don't know if such a person exists)

I am looking for the woman,
(I know this specific woman exists)


(There is someone here)

-Pasajes Lengua; Septima Edicion, pg. 187