<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2012/11/07/121107232444_guatemala8.jpg>
<http://www.bbc.com/mundo/video_fotos/2012/11/121107_galeria_sismo_guatemala_bd.shtml>