<https://www.forum24.cz/nedostatek-plynu-muze-zpusobit-blackout-varuji-odbornici-vypadkum-zatim-lze-zabranit>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.forum24.cz/nedostatek-plynu-muze-zpusobit-blackout-varuji-odbornici-vypadkum-zatim-lze-zabranit/>