mutation {
  CreateMusicComposition(
title: "Das Lied von der Erde"
        contributor: "https://www.cpdl.org"
        creator: "https://www.upf.edu"
        format: "text/html"
        subject: "Music Composition"
        source: "https://www.cpdl.org/Das_Lied_von_der_Erde"
        inLanguage: "de"
        name: "The Song of the Earth"
        language: en
) {
identifier
}
}