<http://schema.org/description>
"Well, Yahoo is doing it so why not Google?  Gary price reports that Google Begins Test of \"Click-to-Call\" Advertising Program.  He shows how Google even posed a page or two on click to call; one page "^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/archives/002847.html>