assertion  retraction  graph  subject             predicate        object              datatype    annotation
1          0           graph  obo:UBERON_0001003  rdfs:label       skin epidermis      xsd:string  
1          0           graph  obo:UBERON_0001003  oio:id           UBERON:0001003      xsd:string  
1          0           graph  obo:UBERON_0001003  rdfs:subClassOf  obo:UBERON_3000961  _IRI        
1          0           graph  obo:UBERON_0001003  rdfs:subClassOf  obo:UBERON_0007376  _IRI        
1          0           graph  obo:UBERON_0001003  rdf:type         owl:Class           _IRI