<http://schema.org/description>
"Every now and then, when you do a search on google at Google.com, you notice sponsored ads on the right side of the page.  Soon after, those ads seem to always disappear.  Google doesn't like it when "^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/archives/003712.html>