def METHOD_NAME(idetifier_pk):
    if settings.RUNNING_TESTS:
        # Never run during tests
        return
    identifier = PersonIdentifier.objects.get(pk=idetifier_pk)
    extractor = FacebookPageIDExtractor(identifier.value)
    try:
        match = extractor.extract()
    except FacebookExtractionError as e:
        print("\t".join([str(identifier.person_id), identifier.value, str(e)]))
        return
    if match:
        identifier.internal_identifier = int(match.group(1))
        identifier.save()
        get_ads_for_page.delay(
            identifier.person_id,
            identifier.internal_identifier,
            identifier.value,
        )
    else:
        print("\t".join([str(identifier.person_id), identifier.value]))