<http://schema.org/description>
"A webmaster noticed his rankings and traffic from Google sharpely declined after the Penguin 2.0 release and decided to ask about it in the Google Webmaster Help forums.The webmaster said they noticed"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-penguin-blame-17051.html>