@prefix skos: . @prefix isothes: . @prefix inist: . skos:prefLabel "Rock"@en, "Roche"@fr ; a isothes:ConceptGroup, skos:Collection ; skos:member . a skos:ConceptScheme . skos:prefLabel "underclay"@en, "mur argileux"@fr, "muro arcilloso"@es ; a skos:Concept ; skos:inScheme ; skos:hiddenLabel "Clayat"@fr, "Underclay"@en, "clayat"@fr ; inist:semCategory "Rock"@en, "Roche"@fr .