assertion  retraction  graph  subject           predicate        object                datatype    annotation
1          0           graph  obo:CHEBI_138675  rdfs:label       gas molecular entity  xsd:string  
1          0           graph  obo:CHEBI_138675  oio:id           CHEBI:138675          xsd:string  
1          0           graph  obo:CHEBI_138675  rdfs:subClassOf  obo:CHEBI_33579       _IRI        
1          0           graph  obo:CHEBI_138675  rdf:type         owl:Class             _IRI