<http://schema.org/description>
"Matt Cutts of Google said in his PubCon Keynote a month or so ago that Google would be stepping up their notifications of spam issues and they indeed have.In early December, Google started sending out"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-unnatural-links-warnings-12761.html>