assertion  retraction  graph  subject          predicate        object         datatype    annotation
1          0           graph  NCBITaxon:11983  rdfs:label       Norwalk virus  xsd:string  
1          0           graph  NCBITaxon:11983  rdfs:subClassOf  OBI:0100026    _IRI        
1          0           graph  NCBITaxon:11983  rdf:type         owl:Class      _IRI