<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://schema.org/MusicRecording>
<https://www.songpop2.com/content/song/Christoph-Pr%C3%A9gardien-%26-Michael-Gees_Liederkreis-Op-24-Sch%C3%B6ne/OGCeN>