assertion  retraction  graph  subject          predicate        object                     datatype    annotation
1          0           graph  obo:CHEBI_53555  rdfs:label       toluene meta-diisocyanate  xsd:string  
1          0           graph  obo:CHEBI_53555  oio:id           CHEBI:53555                xsd:string  
1          0           graph  obo:CHEBI_53555  rdfs:subClassOf  obo:CHEBI_53213            _IRI        
1          0           graph  obo:CHEBI_53555  rdf:type         owl:Class                  _IRI