assertion  retraction  graph  subject     predicate        object     datatype    annotation
1          0           graph  DOID:10887  rdfs:subClassOf  DOID:1024  _IRI        
1          0           graph  DOID:1025   rdfs:subClassOf  DOID:1024  _IRI        
1          0           graph  DOID:1024   oio:id           DOID:1024  xsd:string  
1          0           graph  DOID:1023   rdfs:subClassOf  DOID:1024  _IRI