<http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#nil>
<http://www.bbc.com/mundo/video_fotos/2013/01/130104_galeria_rios_del_mundo_argentina_granbretana_jbo.shtml>