assertion  retraction  graph  subject    predicate        object    datatype    annotation
1          0           graph  DOID:736   oio:id           DOID:736  xsd:string  
1          0           graph  DOID:8259  rdfs:subClassOf  DOID:736  _IRI        
1          0           graph  DOID:6167  rdfs:subClassOf  DOID:736  _IRI        
1          0           graph  DOID:8223  rdfs:subClassOf  DOID:736  _IRI