public IEnumerable <ObjectVariants> GetTriplesWithPredicateObject(ObjectVariants predicate, ObjectVariants obj)
        {
            int pred       = (((OV_iriint)predicate)).code;
            var objVar     = (((ObjectVariants)obj));
            var key_triple = new PO_Pair(pred, objVar);
            IEnumerable <PaEntry> entities = po_ind.GetAllByKey(key_triple);

            return(entities
                   .Select(entry => entry.Get())
                   .Cast <object[]>()
                   .Select(row => ng.GetCoded((int)((object[])row[1])[0])));
        }
        public IEnumerable <ObjectVariants> GetTriplesWithSubjectObject(ObjectVariants subject, ObjectVariants obj)
        {
            int ssubj      = (((OV_iriint)subject)).code;
            var objVar     = (((ObjectVariants)obj));
            var key_triple = new PO_Pair(ssubj, objVar);
            IEnumerable <PaEntry> entities = so_ind.GetAllByKey(key_triple);

            return(entities
                   .Select(entry => entry.Get())
                   .Cast <object[]>()
                   .Select(row => ng.GetCoded((int)((object[])row[1])[1])));
        }