assertion  retraction  graph  subject        predicate        object                    datatype    annotation
1          0           graph  NCBITaxon:837  rdfs:label       Porphyromonas gingivalis  xsd:string  
1          0           graph  NCBITaxon:837  rdfs:subClassOf  OBI:0100026               _IRI        
1          0           graph  NCBITaxon:837  rdf:type         owl:Class                 _IRI