assertion  retraction  graph  subject    predicate        object    datatype    annotation
1          0           graph  DOID:768   oio:id           DOID:768  xsd:string  
1          0           graph  DOID:4648  rdfs:subClassOf  DOID:768  _IRI        
1          0           graph  DOID:4647  rdfs:subClassOf  DOID:768  _IRI        
1          0           graph  DOID:4656  rdfs:subClassOf  DOID:768  _IRI        
1          0           graph  DOID:4653  rdfs:subClassOf  DOID:768  _IRI        
1          0           graph  DOID:4651  rdfs:subClassOf  DOID:768  _IRI        
1          0           graph  DOID:4650  rdfs:subClassOf  DOID:768  _IRI