assertion  retraction  graph  subject          predicate        object           datatype    annotation
1          0           graph  obo:CHEBI_51276  rdfs:label       thioureas        xsd:string  
1          0           graph  obo:CHEBI_51276  oio:id           CHEBI:51276      xsd:string  
1          0           graph  obo:CHEBI_51276  rdfs:subClassOf  obo:CHEBI_50492  _IRI        
1          0           graph  obo:CHEBI_51276  rdf:type         owl:Class        _IRI