<https://secure.gravatar.com/avatar/f5bf6c147b1dda2fe4b5b51d0a9f55f6?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://delangelclinicaveterinaria.com/por-que-los-perros-acompanan/>