public bool Execute(string lemma, string partOfSpeech, List <string> baseForms)
        {
            bool addedBaseForm = false;

            string[] exceptionForms = mEngine.GetExceptionForms(lemma, partOfSpeech);

            foreach (string exceptionForm in exceptionForms)
            {
                if (!baseForms.Contains(exceptionForm))
                {
                    baseForms.Add(exceptionForm);
                    addedBaseForm = true;
                }
            }

            return(addedBaseForm);
        }