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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def clean_text_by_sentences(text, language="english", additional_stopwords=None):
 """ Tokenizes a given text into sentences, applying filters and lemmatizing them. Returns a SyntacticUnit list. """

    init_textcleanner(language, additional_stopwords)
    original_sentences = split_sentences(text)
    filtered_sentences = filter_words(original_sentences)

    return merge_syntactic_units(original_sentences, filtered_sentences)