Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Angkor' has mentioned 'Sandstone' in the following places:
Occurrence Sentence Text Source
The increasing number of tourists, around two million per year,[38] exerts pressure on the archaeological sites at Angkor by walking and climbing on the (mostly) sandstone monuments at Angkor.
[41] The sandstone monuments and Angkor are not made for this type of heightened tourism.