assertion  retraction  graph  subject    predicate      object        datatype    annotation
1          0           graph  DOID:4697  oio:hasDbXref  MESH:D018317  xsd:string  
1          0           graph  DOID:1192  oio:hasDbXref  MESH:D018317  xsd:string  
1          0           graph  DOID:3193  oio:hasDbXref  MESH:D018317  xsd:string