def get_categories_of_column(data: list, column: str, delimiter=',') -> list:
    """Get list of unique categories of non-atomic column which contains
    multiple categorical values splitted by delimiter

    Parameters
    ----------
    data : list
        Data stored in list of dicts
    column : str
        Column name which contains multiple values
    delimiter : str, optional
        Delimiter of values in column, by default ','

    Returns
    -------
    list
        Unique list of categories in variable
    """
    column_values = ''
    for row in data:
        column_values += delimiter + str(row[column])

    splitted = column_values.split(delimiter)[1:]
    categories = list(set(splitted))

    return categories