assertion  retraction  graph  subject    predicate            object                             datatype    annotation
1          0           graph  DOID:7891  rdfs:label           testicular spermatocytic seminoma  xsd:string  
1          0           graph  DOID:7891  oio:id               DOID:7891                          xsd:string  
1          0           graph  DOID:7891  oio:hasOBONamespace  disease_ontology                   xsd:string  
1          0           graph  DOID:7891  rdfs:subClassOf      DOID:5842                          _IRI        
1          0           graph  DOID:7891  rdfs:subClassOf      DOID:5834                          _IRI        
1          0           graph  DOID:7891  rdf:type             owl:Class                          _IRI