<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2014/07/20/140720233321_sp_gaza_624x351_ap_nocredit.jpg>
<http://www.bbc.com/mundo/noticias/2014/07/140720_israel_gaza_inflexion_analisis_az.shtml>