<https://blogs.20minutos.es/errores-y-erratas/2012/06/21/titulares-que-mas-que-informar-desinforman/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blogs.20minutos.es/errores-y-erratas/2012/06/21/titulares-que-mas-que-informar-desinforman/>