Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Isole Eolie (Aeolian Islands)' has mentioned 'World Heritage' in the following places:
Occurrence Sentence Text Source
The Aeolian Islands were listed by UNESCO in 2000 as a World Heritage Site for providing "an outstanding record of volcanic island-building and destruction, and ongoing volcanic phenomena".
[12] Status as a World Heritage Site was threatened by Italy's failure to close the pumice quarry as well as its failure to prevent the building of 4 new harbors.
[13] However, as of 2020[update], it is still listed by UNESCO as a World Heritage site.