assertion  retraction  graph  subject           predicate        object           datatype  annotation
1          0           graph  obo:CHEBI_3508    rdfs:subClassOf  obo:CHEBI_36816  _IRI      
1          0           graph  obo:CHEBI_204928  rdfs:subClassOf  obo:CHEBI_36816  _IRI      
1          0           graph  obo:CHEBI_3515    rdfs:subClassOf  obo:CHEBI_36816  _IRI      
1          0           graph  obo:CHEBI_29007   rdfs:subClassOf  obo:CHEBI_36816  _IRI