assertion  retraction  graph  subject          predicate        object                         datatype    annotation
1          0           graph  obo:CHEBI_37577  rdfs:label       heteroatomic molecular entity  xsd:string  
1          0           graph  obo:CHEBI_37577  oio:id           CHEBI:37577                    xsd:string  
1          0           graph  obo:CHEBI_37577  rdfs:subClassOf  obo:CHEBI_36357                _IRI        
1          0           graph  obo:CHEBI_37577  rdf:type         owl:Class                      _IRI