<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2014/02/11/140211163747_mubarak_photoshopeado_304x171_alahram_nocredit.jpg>
<http://www.bbc.com/mundo/noticias/2014/02/140211_fotos_lideres_photoshop_fidel_castro_ch.shtml>