Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Mammoth Cave National Park' has mentioned 'World Heritage Sites' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| The learning center has contributed to xe2x80x9csister parkxe2x80x9d agreements with other World Heritage sites (China and Slovenia) that protect cave and karst resources. | UNESCO |