<https://www.katzen-forum.net/threads/kater-hat-starke-hustenanfaelle-ursache-unklar.16118/>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<https://www.katzen-forum.net/threads/kater-hat-starke-hustenanfaelle-ursache-unklar.16118/>