<https://brasil.elpais.com/cnio-centro-nacional-investigaciones-oncologicas-a/cnio-centro-nacional-investigaciones-oncologicas/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://brasil.elpais.com/brasil/2014/04/14/sociedad/1397498625_637160.html?rel=listapoyo>