code: def get_lemmas(self, word, pos=None, ignore_case=False):
          
          entries = self.get_entries(word, pos, ignore_case)
          lemmas = list(set([entry["Lemma"] for entry in entries]))
          return sorted(lemmas)
docs: Return all lemmas for a given word. This method assumes that the specified word is present in the dictionary
          :param word: Word that is present in the IWNLP lemmatizer