assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_28876  rdfs:label       melphalan        xsd:string  
1          0           graph  obo:CHEBI_28876  oio:id           CHEBI:28876      xsd:string  
1          0           graph  obo:CHEBI_28876  rdfs:subClassOf  obo:CHEBI_84144  _IRI        
1          0           graph  obo:CHEBI_28876  rdfs:subClassOf  obo:CHEBI_83822  _IRI        
1          0           graph  obo:CHEBI_28876  rdfs:subClassOf  obo:CHEBI_37598  _IRI        
1          0           graph  obo:CHEBI_28876  rdfs:subClassOf  obo:CHEBI_36683  _IRI        
1          0           graph  obo:CHEBI_28876  rdf:type         owl:Class        _IRI