def bye_teams(soup):
    """
    :param soup: a soup object of the NFL's schedule page.
    :return: string of the bye-week teams
    """
    bye = soup.select('span.bye-team')
    if len(bye) == 0:
        return 'None'
    for team in bye:
        text = (team.get_text(strip=True))
        return text