<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/noticias/2014/08/140819_eeuu_siria_james_foley_periodista_perfil_ei_jg.shtml>