assertion  retraction  graph  subject          predicate        object                datatype    annotation
1          0           graph  obo:CHEBI_35873  rdfs:label       carboxylic anhydride  xsd:string  
1          0           graph  obo:CHEBI_35873  oio:id           CHEBI:35873           xsd:string  
1          0           graph  obo:CHEBI_35873  rdfs:subClassOf  obo:CHEBI_36606       _IRI        
1          0           graph  obo:CHEBI_35873  rdfs:subClassOf  obo:CHEBI_36586       _IRI        
1          0           graph  obo:CHEBI_35873  rdf:type         owl:Class             _IRI