assertion  retraction  graph  subject       predicate      object        datatype    annotation
1          0           graph  DOID:0081087  oio:hasDbXref  MESH:D015470  xsd:string  
1          0           graph  DOID:0081086  oio:hasDbXref  MESH:D015470  xsd:string  
1          0           graph  DOID:9119     oio:hasDbXref  MESH:D015470  xsd:string