<http://schema.org/description>
"On April 26th, about one month ago, we reported Google AdWords Glitch: Bid Tool Conflicts With Position Preference Tool.  The problem was and still is that when you enable the Position Preference it d"^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/archives/003870.html>