def postprocess_answer_extraction_output(answer_extraction_output: str):
    """
    Args:
        answer_extraction_output (str): decoded answer extraction output

    Returns:
        answer_text_list (List[str])
    """
    # parse answers
    answers = answer_extraction_output.split("<sep>")[:-1]
    # normalize and append answers
    answer_text_list = []
    for answer_text in answers:
        # append if not present
        if answer_text and (answer_text not in answer_text_list):
            answer_text_list.append(answer_text)
    return answer_text_list