The long-necked giraffe of today, by this theory, resulted from generation after generation of giraffe's stretching their necks to reach higher into trees for food.
(The long-necked giraffe of today; resulted; from generation; T:after generation of giraffe's stretching their necks)
The long-necked giraffe of today
resulted
from generation T:after generation of giraffe's stretching their necks