assertion  retraction  graph  subject          predicate        object           datatype  annotation
1          0           graph  obo:CHEBI_32876  rdfs:subClassOf  obo:CHEBI_50996  _IRI      
1          0           graph  obo:CHEBI_2674   rdfs:subClassOf  obo:CHEBI_50996  _IRI      
1          0           graph  obo:CHEBI_6456   rdfs:subClassOf  obo:CHEBI_50996  _IRI      
1          0           graph  obo:CHEBI_8776   rdfs:subClassOf  obo:CHEBI_50996  _IRI      
1          0           graph  obo:CHEBI_8884   rdfs:subClassOf  obo:CHEBI_50996  _IRI