def filter_abbrs(abbrs, blacklist=[

    # months
    'JAN',
    'FEB',
    'MAR',
    'APR',
    'MAY',
    'JUN',
    'JUL',
    'AUG',
    'SEP',
    'OCT',
    'NOV',
    'DEC',

    # time
    'AM',
    'PM',
    'CE',

]):

    """
    Filter out semantically-unfocused abbreviations.

    Args:
        abbrs (list): The parsed abbreviations.
        blacklist (list): Abbreviations to be removed.

    Returns:
        list: The filtered list.
    """

    return [a for a in abbrs if a not in blacklist]