assertion  retraction  graph  subject              predicate        object               datatype  annotation
1          0           graph  obo:FOODON_00001717  rdfs:subClassOf  obo:FOODON_00002277  _IRI      
1          0           graph  obo:FOODON_00001615  rdfs:subClassOf  obo:FOODON_00002277  _IRI      
1          0           graph  obo:FOODON_00002095  rdfs:subClassOf  obo:FOODON_00002277  _IRI      
1          0           graph  obo:FOODON_00002161  rdfs:subClassOf  obo:FOODON_00002277  _IRI