assertion  retraction  graph  subject       predicate       object  datatype    annotation
1          0           graph  DOID:0060429  oio:created_by  elvira  xsd:string  
1          0           graph  DOID:0060388  oio:created_by  elvira  xsd:string  
1          0           graph  DOID:0060463  oio:created_by  elvira  xsd:string