assertion retraction graph subject predicate object datatype annotation 1 0 graph NCBITaxon:6953 rdfs:label Dermatophagoides xsd:string 1 0 graph NCBITaxon:6953 rdfs:subClassOf OBI:0100026 _IRI 1 0 graph NCBITaxon:6953 rdf:type owl:Class _IRI