code: def insert_silence(
      line_list: List,
      sil_prob: float,
      sil_token: str,
  ):
      line_length = len(line_list)
  
      list_with_silence = []
      if line_length > 1:
          sample_sil_probs = np.random.random(line_length - 1)
  
          for index in range(line_length - 1):
              phones = line_list[index]
              list_with_silence.append(phones)
              if sil_prob >= sample_sil_probs[index]:
                  list_with_silence.append(sil_token)
          list_with_silence.append(line_list[-1])
  
      return list_with_silence
  
file_path: espnet/egs2/slurp/slu1/pyscripts/text/post_processing.py
imports: import argparse
  import sys
  from pathlib import Path
  from typing import List, Optional
  import numpy
  from espnet2.utils.types import str2bool
  from espnet.utils.cli_utils import get_commandline_args
label_desc: Use image node_id 2 for calling a global function with example usage: insert_silence(line_list, sil_prob, sil_token) and returns: list_with_silence