assertion  retraction  graph  subject          predicate        object           datatype  annotation
1          0           graph  obo:CHEBI_50858  rdfs:subClassOf  obo:CHEBI_35341  _IRI      
1          0           graph  obo:CHEBI_35508  rdfs:subClassOf  obo:CHEBI_35341  _IRI      
1          0           graph  obo:CHEBI_35350  rdfs:subClassOf  obo:CHEBI_35341  _IRI