assertion  retraction  graph  subject             predicate        object                  datatype    annotation
1          0           graph  obo:UBERON_0005181  rdfs:label       thoracic segment organ  xsd:string  
1          0           graph  obo:UBERON_0005181  oio:id           UBERON:0005181          xsd:string  
1          0           graph  obo:UBERON_0005181  rdfs:subClassOf  obo:UBERON_0005177      _IRI        
1          0           graph  obo:UBERON_0005181  rdf:type         owl:Class               _IRI