<https://secure.gravatar.com/avatar/97be5eafbbbf74251fd40ac6a3d58f16?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://binarka.net/grafik-barov-ili-o-chem-govoryat-klyushki/>