Occurrence of Attributes in Original Text

The text related to the cultural heritage 'L'viv – the Ensemble of the Historic Centre' has mentioned 'World Heritage' in the following places:
Occurrence Sentence Text Source
Since 1998, the United Nations Educational, Scientific and Cultural Organization (UNESCO) has listed Lviv's historic center as part of "World Heritage".
On 5 December 1998, during the 22nd Session of the World Heritage Committee in Kyoto (Japan), Lviv was added to the UNESCO World Heritage List.
Old Town landmarks that are not part of the World Heritage Site
A management plan for the World Heritage property is under development.