eval for scene classification .There is a name undefined in the test program

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I'm trying to reproduce its scene categorization, but there is a name in the code that is not defined. Below is what is reported as an error: Traceback (most recent call last): File "/opt/data/private/RS-MLLM/GeoChat/./geochat/eval/batch_geochat_scene.py", line 139, in eval_model(args) File "/opt/data/private/RS-MLLM/GeoChat/./geochat/eval/batch_geochat_scene.py", line 49, in eval_model questions = get_chunk(questions, args.num_chunks, args.chunk_idx) NameError: name 'get_chunk' is not defined