def METHOD_NAME(self):
    """Return the subtitle string of the resource.
    Used after the resource name in the filename, and
    also on the resource image.
    Returns:
        text for subtitle (str).
    """
    label = KEY_LABELS[self.options["label"].value]
    if isinstance(label, list):
        label = ", ".join(label)
    return "{} - {}".format(
        label,
        super().METHOD_NAME
    )