assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_35509  rdfs:label       androstane       xsd:string  
1          0           graph  obo:CHEBI_35509  oio:id           CHEBI:35509      xsd:string  
1          0           graph  obo:CHEBI_35509  rdfs:subClassOf  obo:CHEBI_35508  _IRI        
1          0           graph  obo:CHEBI_35509  rdf:type         owl:Class        _IRI