assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_53662  rdfs:label       biguanides       xsd:string  
1          0           graph  obo:CHEBI_53662  oio:id           CHEBI:53662      xsd:string  
1          0           graph  obo:CHEBI_53662  rdfs:subClassOf  obo:CHEBI_24436  _IRI        
1          0           graph  obo:CHEBI_53662  rdf:type         owl:Class        _IRI