assertion  retraction  graph  subject          predicate        object          datatype    annotation
1          0           graph  obo:CHEBI_50906  rdfs:label       role            xsd:string  
1          0           graph  obo:CHEBI_50906  oio:id           CHEBI:50906     xsd:string  
1          0           graph  obo:CHEBI_50906  rdfs:subClassOf  obo:doid#chebi  _IRI        
1          0           graph  obo:CHEBI_50906  rdf:type         owl:Class       _IRI