assertion  retraction  graph  subject          predicate        object          datatype  annotation
1          0           graph  obo:CHEBI_24532  rdfs:subClassOf  obo:CHEBI_5686  _IRI      
1          0           graph  obo:CHEBI_33672  rdfs:subClassOf  obo:CHEBI_5686  _IRI      
1          0           graph  obo:CHEBI_33671  rdfs:subClassOf  obo:CHEBI_5686  _IRI      
1          0           graph  obo:CHEBI_33670  rdfs:subClassOf  obo:CHEBI_5686  _IRI