<http://schema.org/description>
"I remember, probably about a year ago, I went to a Facebook event and spoke one-on-one with Facebook engineers about spam.  They seem to have the sense that it was not a problem then enough to work on"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/facebook-spam-algorithms-18403.html>