<http://schema.org/description>
"A month ago, Google launched native A/B testing for AdSense ads.  When Google was 95% confident of an ad type being a winner, it would show you the results and let you choose the winner to continue to"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-adsense-testing-bug-17824.html>