assertion  retraction  graph  subject        predicate        object       datatype    annotation
1          0           graph  NCBITaxon:590  rdfs:label       Salmonella   xsd:string  
1          0           graph  NCBITaxon:590  rdfs:subClassOf  OBI:0100026  _IRI        
1          0           graph  NCBITaxon:590  rdf:type         owl:Class    _IRI