assertion  retraction  graph  subject       predicate      object       datatype    annotation
1          0           graph  DOID:0081285  oio:hasDbXref  ICDO:9509/1  xsd:string  
1          0           graph  DOID:0081284  oio:hasDbXref  ICDO:9509/1  xsd:string  
1          0           graph  DOID:0081283  oio:hasDbXref  ICDO:9509/1  xsd:string