assertion retraction graph subject predicate object datatype annotation 1 0 graph obo:UBERON_0002097 rdfs:label skin of body xsd:string 1 0 graph obo:UBERON_0002097 oio:id UBERON:0002097 xsd:string 1 0 graph obo:UBERON_0002097 rdfs:subClassOf obo:UBERON_0004121 _IRI 1 0 graph obo:UBERON_0002097 rdfs:subClassOf obo:UBERON_0000062 _IRI 1 0 graph obo:UBERON_0002097 rdf:type owl:Class _IRI