assertion  retraction  graph  subject         predicate        object                   datatype    annotation
1          0           graph  NCBITaxon:1502  rdfs:label       Clostridium perfringens  xsd:string  
1          0           graph  NCBITaxon:1502  rdfs:subClassOf  OBI:0100026              _IRI        
1          0           graph  NCBITaxon:1502  rdf:type         owl:Class                _IRI