<https://secure.gravatar.com/avatar/fd89c32c7f8ec514f48b544454a0fe66?s=96&amp;d=mm&amp;r=g>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://kouc.jannovak.cz/koucovaci-programy/chci-se-zmenit/>