assertion retraction graph subject predicate object datatype annotation 1 0 graph DOID:0070334 IAO:0000115 A food allergy triggered by a vegetable food product. xsd:string "{""oio:hasDbXref"":[{""datatype"":""xsd:string"",""meta"":""owl:Axiom"",""object"":""url:https://farrp.unl.edu/informallvegetables""}]}"