Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Mount Etna' has mentioned 'Landslide' in the following places:
Occurrence Sentence Text Source
Thousands of years ago, the eastern flank of the mountain experienced a catastrophic collapse, generating an enormous landslide in an event similar to that seen in the 1980 eruption of Mount St. Helens.
The landslide left a large depression in the side of the volcano, known as 'Valle del Bove' (Valley of the Ox).