Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Great Smoky Mountains National Park' has mentioned 'UNESCO World Heritage Site' in the following places:
Occurrence Sentence Text Source
[8] The park was designated as a UNESCO World Heritage Site in 1983, and an International Biosphere Reserve in 1988.
This park was designated an International Biosphere Reserve in 1976, was certified as a UNESCO World Heritage Site in 1983, and became a part of the Southern Appalachian Biosphere Reserve in 1988.