assertion  retraction  graph  subject     predicate    object                                                                                                                                                                    datatype    annotation
1          0           graph  DOID:10071  IAO:0000115  A laryngeal benign neoplasm that is characterized by the presence of a connective tissue core covered by stratified squamous epithelium and that has_symptom hoarseness.  xsd:string  "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://www.ncbi.nlm.nih.gov/books/NBK562327/""}]}"