assertion  retraction  graph  subject       predicate        object   datatype    annotation
1          0           graph  DOID:0060005  rdfs:subClassOf  DOID:28  _IRI        
1          0           graph  DOID:28       oio:id           DOID:28  xsd:string  
1          0           graph  DOID:26       rdfs:subClassOf  DOID:28  _IRI        
1          0           graph  DOID:11201    rdfs:subClassOf  DOID:28  _IRI        
1          0           graph  DOID:2277     rdfs:subClassOf  DOID:28  _IRI        
1          0           graph  DOID:53       rdfs:subClassOf  DOID:28  _IRI        
1          0           graph  DOID:50       rdfs:subClassOf  DOID:28  _IRI        
1          0           graph  DOID:9553     rdfs:subClassOf  DOID:28  _IRI