assertion  retraction  graph  subject          predicate        object           datatype  annotation
1          0           graph  obo:CHEBI_53218  rdfs:subClassOf  obo:CHEBI_53213  _IRI      
1          0           graph  obo:CHEBI_53578  rdfs:subClassOf  obo:CHEBI_53213  _IRI      
1          0           graph  obo:CHEBI_53555  rdfs:subClassOf  obo:CHEBI_53213  _IRI