Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Fossil Hominid Sites of South Africa' has mentioned 'Buffer zone' in the following places:
Occurrence Sentence Text Source
The Fossil Hominid Sites of Sterkfontein, Swartkrans, Kromdraai and Environs together with Makapan Valley and Taung Skull Fossil Site comprise five separate components situated in different provinces and each has a buffer zone.