assertion  retraction  graph  subject             predicate        object              datatype    annotation
1          0           graph  obo:UBERON_0003102  rdfs:label       surface structure   xsd:string  
1          0           graph  obo:UBERON_0003102  oio:id           UBERON:0003102      xsd:string  
1          0           graph  obo:UBERON_0003102  rdfs:subClassOf  obo:UBERON_0000061  _IRI        
1          0           graph  obo:UBERON_0003102  rdf:type         owl:Class           _IRI