assertion  retraction  graph  subject        predicate        object                 datatype    annotation
1          0           graph  ONTIE:0003601  rdfs:label       convalescent plasma 1  xsd:string  
1          0           graph  ONTIE:0003601  IAO:0000234      CoVIC-DB               xsd:string  
1          0           graph  ONTIE:0003601  rdfs:subClassOf  COB:0000006            _IRI        
1          0           graph  ONTIE:0003601  rdf:type         owl:Class              _IRI