Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Mammoth Cave National Park' has mentioned 'National parks' in the following places:
Occurrence Sentence Text Source
In contrast to the formation of other national parks in the sparsely populated American West, thousands of people would be forcibly relocated in the process of forming Mammoth Cave National Park.
Part of a national network of learning centers located within national parks, it facilitates the use of parks for scientific inquiry, supports science-informed decision making, and promotes science literacy and resource stewardship.