code: def clean_text_by_sentences(text, language="english", additional_stopwords=None):
      
      init_textcleanner(language, additional_stopwords)
      original_sentences = split_sentences(text)
      filtered_sentences = filter_words(original_sentences)
  
      return merge_syntactic_units(original_sentences, filtered_sentences)
docs: Tokenizes a given text into sentences, applying filters and lemmatizing them.
      Returns a SyntacticUnit list.