<https://carodreva.sk/drevo-v-kocke/serial-druhy-dreva-nie-je-smrek-ako-smrek/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://carodreva.sk/drevo-v-kocke/serial-druhy-dreva-nie-je-smrek-ako-smrek/>