<https://secure.gravatar.com/avatar/6889736c2bcd81befbcb96faa66efab1?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.compuhoy.com/puedes-instalar-juegos-en-ubuntu/>