def _get_from_f(word: dict, key: str):
    """HELPER: extracts the key from the word dictionary

    :param word: dictionary from the json word
    :type word: dict
    :param key: key that needed to be found in the f dictionary that in word
    :type key: str
    :return: value of key in the f key in word dictionary
    :rtype: str
    """
    try:
        if "f" in word:
            if key in word["f"]:
                return word["f"][key]
    except TypeError:
        pass