<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/AggregateOffer>
<http://www.pricegrabber.com/books/books++ciudadana-americana-ingls-en-espanol-nuevo-examen/m-950471203/?search=Traducir+De+Ingles+A+Espanol&ut=6b14592f0891814b>