<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2014/06/30/140630120518_combatiente_de_isis_624x351_reuters.jpg>
<http://www.bbc.com/mundo/noticias/2014/06/140630_irak_siria_estado_islamico_califato_nc.shtml>