public static String lookupStringValue(NamedDescription relation, LogicObject instance, Module mod) {
    { edu.isi.powerloom.PlIterator iter = edu.isi.powerloom.PLI.retrieve(Cons.list$(Cons.cons(IntegerWrapper.wrapInteger(1), Cons.cons(Cons.cons(Logic.objectName(relation), Cons.cons(instance, Cons.cons(RDBMS.SYM_LOGIC_pX, Stella.NIL))), Cons.cons(Stella.NIL, Stella.NIL)))), mod, null);

      if (iter.nextP()) {
        return (((StringWrapper)(iter.value)).wrapperValue);
      }
      else {
        return (null);
      }
    }
  }