assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:1459 IAO:0000115 A thyroid gland disease which involves an underproduction of thyroid hormone. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://medlineplus.gov/hypothyroidism.html""}]}"