<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/2013/07/29/130729083200_gibraltar_rock_304x171_pa.jpg>
<http://www.bbc.com/mundo/ultimas_noticias/2013/08/130804_ultnot_reino_unido_gibraltar_espana_jrg.shtml>