assertion  retraction  graph  subject             predicate        object              datatype    annotation
1          0           graph  obo:UBERON_0001981  rdfs:label       blood vessel        xsd:string  
1          0           graph  obo:UBERON_0001981  oio:id           UBERON:0001981      xsd:string  
1          0           graph  obo:UBERON_0001981  rdfs:subClassOf  obo:UBERON_0004120  _IRI        
1          0           graph  obo:UBERON_0001981  rdfs:subClassOf  obo:UBERON_0000055  _IRI        
1          0           graph  obo:UBERON_0001981  rdf:type         owl:Class           _IRI