assertion  retraction  graph  subject          predicate        object           datatype  annotation
1          0           graph  obo:CHEBI_24866  rdfs:subClassOf  obo:CHEBI_37577  _IRI      
1          0           graph  obo:CHEBI_37578  rdfs:subClassOf  obo:CHEBI_37577  _IRI      
1          0           graph  obo:CHEBI_24651  rdfs:subClassOf  obo:CHEBI_37577  _IRI      
1          0           graph  obo:CHEBI_33241  rdfs:subClassOf  obo:CHEBI_37577  _IRI      
1          0           graph  obo:CHEBI_33692  rdfs:subClassOf  obo:CHEBI_37577  _IRI