assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_60004  rdfs:label       mixture          xsd:string  
1          0           graph  obo:CHEBI_60004  oio:id           CHEBI:60004      xsd:string  
1          0           graph  obo:CHEBI_60004  rdfs:subClassOf  obo:CHEBI_59999  _IRI        
1          0           graph  obo:CHEBI_60004  rdf:type         owl:Class        _IRI