<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef-1.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2013/06/06/130606101849_hugo_chavez_304x171_ap.jpg>
<http://www.bbc.com/mundo/noticias/2014/05/140416_eeuu_television_retirada_barbara_walters_entrevistas_jg.shtml>