Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Historic Centre of Vienna' has mentioned 'World Heritage' in the following places:
Occurrence Sentence Text Source
In 2001, the city center was designated a UNESCO World Heritage Site.
The Management Plan, which was elaborated in 2002, refers to the two World Heritage properties in Vienna (Historic Centre of Vienna, and Palace and Gardens of Schxc3xb6nbrunn).