:raise urllib2.URLError | urllib.error.URLError: When
    :return:

def get_impediments():
    """
    :raise urllib2.URLError | urllib.error.URLError: When
    :return:
    """
    file = urlopen(XML_URL)

    doc = dom.parse(file)
    xml = doc.documentElement

    nodes = xml.getElementsByTagName('utr')
    impediments = [extract(node) for node in nodes]

    return impediments