<http://schema.org/description>
"Google has announced a new option to bid differently for phone calls versus clicks to your web site with Bid To Call charged on a cost-per-phone call (CPP) basis.So if you are willing to pay $5 for a "^^<http://www.w3.org/2001/XMLSchema#string>
<https://www.seroundtable.com/google-bid-to-call-14206.html>