Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Ujung Kulon National Park' has mentioned 'World Heritage' in the following places:
Occurrence Sentence Text Source
It is Indonesia's first proposed national park and was declared a UNESCO World Heritage Site in 1991 for containing the largest remaining lowland rainforest in Java.
Parts of today's national park and World Heritage site have been protected since the early 20th century.