assertion  retraction  graph  subject     predicate        object      datatype    annotation
1          0           graph  DOID:10124  oio:id           DOID:10124  xsd:string  
1          0           graph  DOID:6199   rdfs:subClassOf  DOID:10124  _IRI        
1          0           graph  DOID:6198   rdfs:subClassOf  DOID:10124  _IRI