assertion  retraction  graph  subject          predicate        object                 datatype    annotation
1          0           graph  obo:CHEBI_53050  rdfs:label       trimellitic anhydride  xsd:string  
1          0           graph  obo:CHEBI_53050  oio:id           CHEBI:53050            xsd:string  
1          0           graph  obo:CHEBI_53050  rdfs:subClassOf  obo:CHEBI_38831        _IRI        
1          0           graph  obo:CHEBI_53050  rdfs:subClassOf  obo:CHEBI_36609        _IRI        
1          0           graph  obo:CHEBI_53050  rdfs:subClassOf  obo:CHEBI_35951        _IRI        
1          0           graph  obo:CHEBI_53050  rdf:type         owl:Class              _IRI