keep https://w3id.org/framester/pb/pbdata/keep.04 <https://w3id.org/framester/pb/pbschema/RoleSet> rdfs:label xsd:string keep rdf:type <https://w3id.org/framester/pb/pbschema/RoleSet> <https://w3id.org/framester/pb/pbschema/hasRole> <https://w3id.org/framester/pb/pbdata/keep.04__0> <https://w3id.org/framester/pb/pbdata/keep.04__1> <http://www.ontologydesignpatterns.org/ont/values/valuecore_with_value_frames.owl#triggers> <http://www.ontologydesignpatterns.org/ont/values/FolkValues.owl#Perseverance> risorse dalla linked data cloud