<https://elpais.com/hospital-clinico-san-carlos-a/hospital-clinico-san-carlos/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/CollectionPage>
<https://elpais.com/diario/2004/11/16/salud/1100559603_850215.html>