assertion  retraction  graph  subject          predicate        object           datatype  annotation
1          0           graph  obo:CHEBI_35716  rdfs:subClassOf  obo:CHEBI_72695  _IRI      
1          0           graph  obo:CHEBI_33832  rdfs:subClassOf  obo:CHEBI_72695  _IRI      
1          0           graph  obo:CHEBI_36587  rdfs:subClassOf  obo:CHEBI_72695  _IRI