from typing import List


def parse_header(header_string: str, sep: str = '\t') -> List:
    """Parses header data.

    Args:
        header_string: A string containing header items.
        sep: A string containing a delimiter.

    Returns:
        A list of header items.
    """

    header = header_string.strip().split(sep)
    return [i.replace('"', '') for i in header]