assertion retraction graph subject predicate object datatype annotation 1 0 graph ONTIE:0002183 OBI:9991118 Myoglobin xsd:string 1 0 graph ONTIE:0002182 OBI:9991118 Myoglobin xsd:string 1 0 graph ONTIE:0002181 OBI:9991118 Myoglobin xsd:string