<https://vocabs.acdh.oeaw.ac.at/traveldigital/Concept01.04.01>
<http://www.w3.org/2004/02/skos/core#narrower>
<https://vocabs.acdh.oeaw.ac.at/traveldigital_thesaurus/de/page/Concept4019200?clang=en&anylang=on>