Property: Attachment link
From The Lost Media Wiki
The "Attachment link" label was matched to at least one other property representation. Please consult the help page on how to resolve this issue.
"Attachment link" is a predefined property that collects embedded file and image links found in a page and is provided by Semantic MediaWiki. This property is pre-deployed (also known as special property) and comes with additional administrative privileges but can be used just like any other user-defined property.