assertion  retraction  graph  subject            predicate        object       datatype    annotation
1          0           graph  NCBITaxon:1783257  rdfs:label       PVC group    xsd:string  
1          0           graph  NCBITaxon:1783257  rdfs:subClassOf  NCBITaxon:2  _IRI        
1          0           graph  NCBITaxon:1783257  rdf:type         owl:Class    _IRI