assertion  retraction  graph  subject       predicate        object      datatype    annotation
1          0           graph  DOID:0080618  rdfs:subClassOf  DOID:10619  _IRI        
1          0           graph  DOID:10619    oio:id           DOID:10619  xsd:string  
1          0           graph  DOID:13005    rdfs:subClassOf  DOID:10619  _IRI        
1          0           graph  DOID:12972    rdfs:subClassOf  DOID:10619  _IRI