@prefix gacs: . @prefix skos: . @prefix rdfs: . @prefix owl: . @prefix rdf: . @prefix dc: . gacs:C17796 skos:definition gacs:def_91de8895 . rdfs:label "Concept definition"@en ; a owl:Class . gacs:def_91de8895 rdf:value "The stable isotope of hydrogen. It has one neutron and one proton in the nucleus."@en ; dc:source ; a .