assertion  retraction  graph  subject       predicate        object        datatype    annotation
1          0           graph  DOID:0080146  rdfs:subClassOf  DOID:0080144  _IRI        
1          0           graph  DOID:0080145  rdfs:subClassOf  DOID:0080144  _IRI        
1          0           graph  DOID:0080144  oio:id           DOID:0080144  xsd:string