, num_labels`
            class_labels (`List[torch.Tensor]`):
                List of class labels of shape `(labels)`.
            indices (`Tuple[np.array])`:
                The indices computed by the Hungarian matcher.

        Returns:
            `Dict[str, Tensor]`: A dict of `torch.Tensor` containing the following key:
            - **loss_cross_entropy** -- The loss computed using cross entropy on the predicted and ground truth labels.
        )