assertion  retraction  graph  subject          predicate        object                      datatype    annotation
1          0           graph  obo:CHEBI_51959  rdfs:label       organic tricyclic compound  xsd:string  
1          0           graph  obo:CHEBI_51959  oio:id           CHEBI:51959                 xsd:string  
1          0           graph  obo:CHEBI_51959  rdfs:subClassOf  obo:CHEBI_51958             _IRI        
1          0           graph  obo:CHEBI_51959  rdf:type         owl:Class                   _IRI