<http://schema.org/description>
"According to a thread at SEW forum started by AussieWebmaster (a mod there), the AdWords ads at Google's search engine has been dropping out the title of the ad text.  It seems to be an issue caused b"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/archives/000862.html>