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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 make_input_from_plain_string(sentence_id: SentenceId, string: str) -> TranslatorInput: """ Returns a TranslatorInput object from a plain string. :param sentence_id: Sentence id. :param string: An input string. :return: A TranslatorInput. """

    return TranslatorInput(sentence_id, tokens=list(data_io.get_tokens(string)), factors=None)