assertion  retraction  graph  subject           predicate        object           datatype  annotation
1          0           graph  obo:CHEBI_46633   rdfs:subClassOf  obo:CHEBI_27171  _IRI      
1          0           graph  obo:CHEBI_35875   rdfs:subClassOf  obo:CHEBI_27171  _IRI      
1          0           graph  obo:CHEBI_35992   rdfs:subClassOf  obo:CHEBI_27171  _IRI      
1          0           graph  obo:CHEBI_167099  rdfs:subClassOf  obo:CHEBI_27171  _IRI      
1          0           graph  obo:CHEBI_38311   rdfs:subClassOf  obo:CHEBI_27171  _IRI