assertion  retraction  graph  subject    predicate        object    datatype    annotation
1          0           graph  DOID:369   rdfs:subClassOf  DOID:370  _IRI        
1          0           graph  DOID:8256  rdfs:subClassOf  DOID:370  _IRI        
1          0           graph  DOID:370   oio:id           DOID:370  xsd:string