assertion  retraction  graph  subject          predicate        object                     datatype    annotation
1          0           graph  obo:CHEBI_33608  rdfs:label       hydrogen molecular entity  xsd:string  
1          0           graph  obo:CHEBI_33608  oio:id           CHEBI:33608                xsd:string  
1          0           graph  obo:CHEBI_33608  rdfs:subClassOf  obo:CHEBI_33674            _IRI        
1          0           graph  obo:CHEBI_33608  rdf:type         owl:Class                  _IRI