assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:7713  rdfs:subClassOf  DOID:3643  _IRI        
1          0           graph  DOID:3643  oio:id           DOID:3643  xsd:string  
1          0           graph  DOID:7103  rdfs:subClassOf  DOID:3643  _IRI        
1          0           graph  DOID:8058  rdfs:subClassOf  DOID:3643  _IRI