Occurrence of Attributes in Original Text

The text related to the cultural heritage 'Danube Delta' has mentioned 'Well' in the following places:
Occurrence Sentence Text Source
Reed plants and floating reed islands (called plaur in Romania) are the most common and well known components of the Danube Delta.
These corrections, as well as the digging of various secondary channels throughout the body of the delta, have had a serious impact on the ecosystem.