"subject","predicate","object" "http://lod.xdams.org/reload/oad#extentAndMedium","http://www.w3.org/2000/01/rdf-schema#isDefinedBy","http://lod.xdams.org/reload/isadOntology/isad_3.1.5_extent_and_medium_of_the_unit_of_description"