<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/2013/04/11/130411192939_nicolas_maduro_512x288_ap.jpg>
<http://www.bbc.com/mundo/noticias/2012/12/121207_venezuela_perfil_nicolas_maduro_az.shtml>