Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Mount Nimba Strict Nature Reserve' has mentioned 'World Heritage' in the following places:
Occurrence Sentence Text Source
Mount Nimba Strict Nature Reserve is a protected area and UNESCO World Heritage Site located in both Guinea and Cxc3xb4te d'Ivoire, extending over a total of area of 17,540 hectares, with 12,540 hectares in Guinea, and 5,000 hectares in Cxc3xb4te d'Ivoire.
Both reserves were combined to form one World Heritage Site in 1981 (Guinea) and 1982 (Cxc3xb4te d'Ivoire).
[1] Iron-ore exploration for mining in the most vulnerable montane zone started in 1982, the reserve was listed as UNESCO World Heritage Site in danger since then.