<http://schema.org/description>
"For years and years, as far as I know, users will sporadically get a survey from Google asking them to rate the search results or ask which search result they prefer. Eli Schwartz (no relation) emaile"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-web-search-survey-16114.html>