Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Jeju Volcanic Island and Lava Tubes' has mentioned 'Nature reserve' in the following places:
Occurrence Sentence Text Source
Since 1966, any area 800 meters above sea level has been designated as a nature reserve.
Over 17 mammals, 198 types of birds, 8 types of amphibians, 8 types of reptiles, and 947 insect species have been catalogued in the nature reserve.
Halla Nature Reserve is the Pillemot Cave, a site dating to the Paleolithic period.