assertion  retraction  graph  subject             predicate        object              datatype    annotation
1          0           graph  obo:UBERON_0000062  rdfs:label       organ               xsd:string  
1          0           graph  obo:UBERON_0000062  oio:id           UBERON:0000062      xsd:string  
1          0           graph  obo:UBERON_0000062  rdfs:subClassOf  obo:UBERON_0010000  _IRI        
1          0           graph  obo:UBERON_0000062  rdf:type         owl:Class           _IRI