<http://schema.org/description>
"In a Google Tech Talk on October 22, 2012, Google's Chief Economist Hal Varian said that Google runs a lot of experiments.  So many that a typical Google searcher/user will see a dozen or more experim"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-tests-daily-16039.html>