    def caption_prompt(self, caption=None) -> str:
        """Get the prompt to use for caption evaluation. If the caption is not provided, it should be left blank to be generated by the model.

        Returns:
            The prompt to use for captioning.
        """
Get the prompt to use for caption evaluation. If the caption is not provided, it should be left blank to be generated by the model.

Returns:
The prompt to use for captioning.
open_flamingo/eval/eval_model.py