import csv


def parse_csv_data(csv_filename : str) -> list:
    """Returns a list of strings for all lines in a CSV file.

        Parameters:
            csv_filename (str): The name of some CSV file to be parsed.

        Returns:
            data (list): A list of strings for all lines of the CSV file.
    """        
    file_1 = open(csv_filename, "r")
    csvreader = csv.reader(file_1) # Read csv to variable 'csvreader'
    data = []
    for row in csvreader:
        data.append(row) # Append all data read from csv to list, row by row

    return data