assertion  retraction  graph  subject           predicate        object           datatype  annotation
1          0           graph  obo:CHEBI_474859  rdfs:subClassOf  obo:CHEBI_24129  _IRI      
1          0           graph  obo:CHEBI_3515    rdfs:subClassOf  obo:CHEBI_24129  _IRI      
1          0           graph  obo:CHEBI_8776    rdfs:subClassOf  obo:CHEBI_24129  _IRI