assertion  retraction  graph  subject             predicate        object              datatype    annotation
1          0           graph  obo:UBERON_0000945  rdfs:label       stomach             xsd:string  
1          0           graph  obo:UBERON_0000945  oio:id           UBERON:0000945      xsd:string  
1          0           graph  obo:UBERON_0000945  rdfs:subClassOf  obo:UBERON_0010039  _IRI        
1          0           graph  obo:UBERON_0000945  rdfs:subClassOf  obo:UBERON_0004921  _IRI        
1          0           graph  obo:UBERON_0000945  rdf:type         owl:Class           _IRI