<http://schema.org/description>
"Yesterday, At SES San Francisco during the Matt Cutts keynote, Matt answered some questions about the Penguin update that has many SEOs and webmaster shaking in their boots.Update from Matt Cutts: Mat"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-penguin-warning-15577.html>