assertion  retraction  graph  subject       predicate        object   datatype    annotation
1          0           graph  DOID:10534    rdfs:subClassOf  DOID:76  _IRI        
1          0           graph  DOID:76       oio:id           DOID:76  xsd:string  
1          0           graph  DOID:275      rdfs:subClassOf  DOID:76  _IRI        
1          0           graph  DOID:9138     rdfs:subClassOf  DOID:76  _IRI        
1          0           graph  DOID:0040090  rdfs:subClassOf  DOID:76  _IRI