<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2014/06/21/140621040133_sp_isis_militants_and_supporters_464x261_ap.jpg>
<http://www.bbc.com/mundo/ultimas_noticias/2014/06/140620_ulnot_britanico_padre_yihadistas_bd.shtml>