Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Wood Buffalo National Park' has mentioned 'North America' in the following places:
Occurrence Sentence Text Source
It is the most ecologically complete and largest example of the Great Plains-Boreal grassland ecosystem of North America.
Wood Buffalo National Park is an outstanding example of ongoing ecological and biological processes encompassing some of the largest undisturbed grass and sedge meadows left in North America.
Criterion (ix): Wood Buffalo National Park is the most ecologically complete and largest example of the entire Great Plains-Boreal grassland ecosystem of North America, the only place where the predator-prey relationship between wolves and wood bison has continued, unbroken, over time.