def tokenize(self, untokenized_string: str, model=None):
        """Alias for tokenize_sentences()—NLTK's PlaintextCorpusReader needs a
        function called tokenize in functions used as a parameter for sentence
        tokenization.

        :type untokenized_string: str
        :param untokenized_string: A string containing one of more sentences.
        """
        if self.language in INDIAN_LANGUAGES:
            return self.indian_punctuation_tokenize_regex(untokenized_string)
        else:
            return self.tokenize_sentences(untokenized_string)