Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Jeju Volcanic Island and Lava Tubes' has mentioned 'Volcano' in the following places:
Occurrence Sentence Text Source
The main volcano includes 360 satellite volcanoes.
The most recent eruptions are estimated to be about 5,000 years ago, which puts the volcano into the active classification, meaning eruptions in the last 10,000 years.
[4][5] The designation as active is not agreed by all, as more monitoring and study are needed to better understand the volcano.