assertion  retraction  graph  subject           predicate            object               datatype    annotation
1          0           graph  obo:SYMP_0000025  oio:hasExactSynonym  nonproductive cough  xsd:string  "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.healthline.com/health/dry-cough""}]}"