<http://www.w3.org/1999/02/22-rdf-syntax-ns#rest>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#nil>
<http://www.bbcmundo.com/mundo/noticias/2012/12/121108_profecia_maya_fin_del_mundo_negocio_2012_mexico_an.shtml>