Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Everglades National Park' has mentioned 'National parks' in the following places:
Occurrence Sentence Text Source
Most national parks preserve unique geographic features; Everglades National Park was the first created to protect a fragile ecosystem.
At the turn of the 20th century, common concepts of what should be protected in national parks invariably included formidable geologic features like mountains, geysers, or canyons.
About 2,000 crocodiles live in Florida, and there are roughly 100 nests in the Everglades and Biscayne National Parks.