assertion  retraction  graph  subject             predicate        object              datatype    annotation
1          0           graph  obo:UBERON_0002553  rdfs:label       anatomical cavity   xsd:string  
1          0           graph  obo:UBERON_0002553  oio:id           UBERON:0002553      xsd:string  
1          0           graph  obo:UBERON_0002553  rdfs:subClassOf  obo:UBERON_0000464  _IRI        
1          0           graph  obo:UBERON_0002553  rdf:type         owl:Class           _IRI