Go thru table data in `html_chunk` and try to locate content of the
    neighbor cell of the cell containing `what`.

    Returns:
        str: Table data or None.

def _parse_from_table(html_chunk, what):
    """
    Go thru table data in `html_chunk` and try to locate content of the
    neighbor cell of the cell containing `what`.

    Returns:
        str: Table data or None.
    """
    ean_tag = html_chunk.find("tr", fn=must_contain("th", what, "td"))

    if not ean_tag:
        return None

    return get_first_content(ean_tag[0].find("td"))