<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2013/09/13/130913192159_sp_luis_de_guindos_304x171_ap.jpg>
<http://www.bbc.com/mundo/ultimas_noticias/2013/09/130913_ultnot_record_deuda_espana_bd.shtml>