def simple_get(url):
    """
    Attempts to get the content at `url` by making an HTTP GET request.
    If the content-type of response is some kind of HTML/XML, return the
    text content, otherwise return None.
    """
    try:
        resp = requests.get(url)
        ctype = resp.headers['Content-Type'].lower()
        if (resp.status_code == 200 and ctype is not None and 'html' in ctype):
            # well-formed response
            return resp.content
    except RequestException as e:
        print(f'Error during requests to {url} : {e}')

    return None