\
    Returns a set of cable identifiers of cables published by Aftenposten.
    See: <http://aebr.home.xs4all.nl/wl/aftenposten/>

def _aftenposten_cable_ids():
    """\
    Returns a set of cable identifiers of cables published by Aftenposten.
    See: <http://aebr.home.xs4all.nl/wl/aftenposten/>
    """
    s = urllib2.urlopen(_AP_IRI).read()
    return set(_WL_CABLE_ID_PATTERN.findall(s))