def add_extra_token_pat(ambiguous_seg_pat):
    """extra context tokens added to ambiguous seg pat

    Args:
        ambiguous_seg_pat (str): ambiguous segmentation pattern

    Returns:
        str: ambiguous seg pat with extra context token
    """
    extra_token_pat = r' \S+?/\S '
    ambiguous_seg_pat_with_extra_token_pat = f'{extra_token_pat}{ambiguous_seg_pat}{extra_token_pat}'
    ambiguous_seg_pat_with_extra_token_pat = ambiguous_seg_pat_with_extra_token_pat.replace('  ', ' ')
    return ambiguous_seg_pat_with_extra_token_pat