assertion  retraction  graph  subject              predicate        object                      datatype  annotation
1          0           graph  obo:FOODON_00002185  rdfs:label       rainbow trout food product  @en       
1          0           graph  obo:FOODON_00002185  rdfs:subClassOf  obo:FOODON_00002075         _IRI      
1          0           graph  obo:FOODON_00002185  rdf:type         owl:Class                   _IRI