from typing import List


def get_sentence(sentences: List[str], sentence_num: int):
    """
    Helper function converting raw sentences into a list of words.

    :param sentences: The list of sentences as strings
    :param sentence_num: The number of the sentence to get
    :return: The sentence as a list of words as strings
    """

    sentence = sentences[sentence_num]
    sentence = [word for word in sentence.rsplit(" ") if word != ""]

    return sentence