assertion  retraction  graph  subject              predicate        object               datatype  annotation
1          0           graph  obo:FOODON_00001165  rdfs:subClassOf  obo:FOODON_00001015  _IRI      
1          0           graph  obo:FOODON_00001262  rdfs:subClassOf  obo:FOODON_00001015  _IRI      
1          0           graph  obo:FOODON_00001261  rdfs:subClassOf  obo:FOODON_00001015  _IRI