assertion  retraction  graph  subject       predicate                                         object           datatype    annotation
1          0           graph  DOID:0040091  oio:hasDbXref                                     MESH:D000081012  xsd:string  
1          0           graph  DOID:0040091  <http://www.w3.org/2004/02/skos/core#exactMatch>  MESH:D000081012  xsd:string