<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2012/09/26/120926233938_chirriadero.jpg>
<http://www.bbc.com/mundo/noticias/2012/10/120926_colombia_proceso_paz_cauca_aw.shtml>