<https://blog.coppel.com/maquina-de-coser-aprende-como-coser-tus-prendas-en-casa-paso-a-paso#webpage>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://blog.coppel.com/maquina-de-coser-aprende-como-coser-tus-prendas-en-casa-paso-a-paso>