assertion  retraction  graph  subject    predicate      object        datatype    annotation
1          0           graph  DOID:1967  oio:hasDbXref  MESH:D007890  xsd:string  
1          0           graph  DOID:5268  oio:hasDbXref  MESH:D007890  xsd:string  
1          0           graph  DOID:5264  oio:hasDbXref  MESH:D007890  xsd:string