        def infer_silence_token(vocab: list):
            """
            Different HF checkpoints have different notion of silence token
            such as | or " " (space)
            Important: when adding new HF asr model in, check what silence token it uses
            """
            if "|" in vocab:
                return "|"
            elif " " in vocab:
                return " "
            else:
                raise RuntimeError("Silence token is not found in the vocabulary")
Different HF checkpoints have different notion of silence token
such as | or " " (space)
Important: when adding new HF asr model in, check what silence token it uses
examples/speech_to_speech/asr_bleu/utils.py