assertion  retraction  graph  subject       predicate        object     datatype    annotation
1          0           graph  DOID:0050924  rdfs:subClassOf  DOID:4045  _IRI        
1          0           graph  DOID:4045     oio:id           DOID:4045  xsd:string  
1          0           graph  DOID:4043     rdfs:subClassOf  DOID:4045  _IRI        
1          0           graph  DOID:4230     rdfs:subClassOf  DOID:4045  _IRI