assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_22527  rdfs:label       aminopurine      xsd:string  
1          0           graph  obo:CHEBI_22527  oio:id           CHEBI:22527      xsd:string  
1          0           graph  obo:CHEBI_22527  rdfs:subClassOf  obo:CHEBI_26401  _IRI        
1          0           graph  obo:CHEBI_22527  rdf:type         owl:Class        _IRI