Occurrence of Attributes in Original Text
The text related to the cultural heritage 'Mount Etna' has mentioned 'Valley' in the following places:
| Occurrence Sentence | Text Source |
|---|---|
| The steep walls of the valley have suffered subsequent collapses on numerous occasions. | WIKI |
| The strata exposed in the valley walls provide an important and easily accessible record of Etna's eruptive history. | WIKI |