<http://schema.org/model>
"Sierra 2500HD available WiFi"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.sewell.com/VehicleDetails/used-2015-GMC-Sierra_2500HD_available_WiFi-4X4_DENALI_%2F_NAVIGATION_%2F_SUNROOF-Houston-TX/2850803103>