assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:5194 rdfs:subClassOf DOID:4163 _IRI 1 0 graph DOID:5193 rdfs:subClassOf DOID:4163 _IRI 1 0 graph DOID:5195 rdfs:subClassOf DOID:4163 _IRI 1 0 graph DOID:4163 oio:id DOID:4163 xsd:string