def fetch_country_data():
    r = requests.get(URL)
    soup = bs4.BeautifulSoup(r.content, 'html.parser')
    for tag in soup.find_all("strong", attrs={"itemprop": "member"}):
        href = tag.nextSibling()[0]
        url2 = href.attrs['href']
        yield grequests.get(
            join(BASE_URL, url2.lstrip('/')),
            session=retry(3)
        )