assertion  retraction  graph  subject    predicate             object        datatype    annotation
1          0           graph  DOID:8632  oio:hasDbXref         NCI:C9087     xsd:string  
1          0           graph  DOID:8632  oio:hasDbXref         ICD9CM:176.0  xsd:string  
1          0           graph  DOID:8632  oio:hasAlternativeId  DOID:12777    xsd:string  
1          0           graph  DOID:8632  oio:hasDbXref         NCI:C6377     xsd:string