<http://schema.org/category>
"Fifth Wheel"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.rvusa.com/rvs-for-sale/2017/heartland-rv-fifth-wheel-39mbhs-bunk-model-rv-for-sale-wking-bed-fifth-wheel-new-alvarado-texas-76009-1930316>