<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/WebSite>
<http://www.marketingdeservicios.com/gestion-rentable-clientes/fidelizacion-de-clientes/en-tiempos-de-crisis-preocupense-por-retener-a-sus-clientes/>