assertion  retraction  graph  subject           predicate    object                                                                                                                                                                     datatype    annotation
1          0           graph  obo:SYMP_0000731  IAO:0000115  A urinary system symptom that is characterized by a loss of excretory function in one or both kidneys, leading to retention of nitrogenous waste products from the blood.  xsd:string  "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.ncbi.nlm.nih.gov/books/NBK519012/""}]}"