Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Pirin National Park' has mentioned 'World Heritage' in the following places:
Occurrence Sentence Text Source
Pirin National Park was declared a UNESCO World Heritage Site in 1983.
This sparked a wave of protests against the continuous tampering with the world heritage site, which have continued throughout February and March 2018.
The World Heritage property covers an area of around 40,000 ha in the Pirin Mountains, southwest Bulgaria, and overlaps with the undeveloped areas of Pirin National Park.
The original inscription of the property in 1983 proved to be inadequate in representing and maintaining the Outstanding Universal Value of Pirin, but an extension in 2010 has addressed the issues to the best possible degree and represents the minimum area of Pirin National Park that can be considered to correspond to the requirements of Outstanding Universal Value set out in the World Heritage Convention.
Adequate boundaries have been established through the extension of the initially inscribed property, to include the most remote areas of the interior of the National Park, and exclude adjacent areas that are not compatible with World Heritage status due to impacts on integrity from ski development.
The World Heritage property has long been subject to tourism pressure, largely caused by the development of ski facilities and ski runs.