<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2012/01/11/120111162728_policia_colombia_304x171_reuters.jpg>
<http://www.bbc.com/mundo/noticias/2013/01/130130_colombia_farc_secuestros_proceso_paz_aw.shtml>