assertion  retraction  graph  subject    predicate        object     datatype    annotation
1          0           graph  DOID:1626  oio:id           DOID:1626  xsd:string  
1          0           graph  DOID:8227  rdfs:subClassOf  DOID:1626  _IRI        
1          0           graph  DOID:7984  rdfs:subClassOf  DOID:1626  _IRI        
1          0           graph  DOID:8225  rdfs:subClassOf  DOID:1626  _IRI        
1          0           graph  DOID:8224  rdfs:subClassOf  DOID:1626  _IRI