<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ichef.bbci.co.uk/news/ws/560/amz/worldservice/live/assets/images/2014/08/22/140822105039_klaus_zapf_304x171_9er.jpg>
<http://www.bbc.com/mundo/ultimas_noticias/2014/08/140822_ultnot_magnate_humilde_alemania_muerte_men.shtml>