assertion  retraction  graph  subject              predicate        object               datatype  annotation
1          0           graph  obo:FOODON_00001248  rdfs:subClassOf  obo:FOODON_00001092  _IRI      
1          0           graph  obo:FOODON_00001256  rdfs:subClassOf  obo:FOODON_00001092  _IRI      
1          0           graph  obo:FOODON_00001274  rdfs:subClassOf  obo:FOODON_00001092  _IRI      
1          0           graph  obo:FOODON_00001251  rdfs:subClassOf  obo:FOODON_00001092  _IRI