<https://blog.pacoherreroazorin.com/2021/06/la-crisis-de-los-13-y-el-entusiasmo.html>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blog.pacoherreroazorin.com/2021/06/la-crisis-de-los-13-y-el-entusiasmo.html>