<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2012/09/17/120917162309_kate_middleton_duchess_of_cambridge_topless_304x171_getty.jpg>
<http://www.bbc.com/mundo/noticias/2012/09/120917_fotografo_kate_middleton_privacidad_jgc.shtml>