<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2014/02/11/140211150557_cory_monteith_304x171_reuters.jpg>
<http://www.bbc.com/mundo/blogs/2014/02/140211_blog_editores_fama_y_noticias.shtml>