<http://schema.org/description>
"You see that Google+ icon either on the left hand side or the top right of this content?  Well, every time you plus one vote up this content, Google tracks it.  It is supposedly reported within Google"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-vote-drop-16348.html>