Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Prehistoric Rock Art Sites in the Côa Valley and Siega Verde' has mentioned 'Plant' in the following places:
Occurrence Sentence Text Source
The UNESCO reports were not unanimous on whether the power plant should be cancelled; Clottes, the head of prehistoric department, noted that rising water may protect the engravings from vandalism, but also confirmed that Coa Valley "is the biggest open air site of palaeolithic art in Europe, if not in the world".