<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://dm.h-cdn.co/assets/16/39/640x320/landscape-1474900759-reyes02.jpg>
<http://www.diezminutos.es/familia-real/monarquia-espanola/news/a4526/que-han-hecho-los-reyes-este-fin-de-semana/>