code: def add_start_end_token(file):
      f1 = open(file + ".elmo", "w")
      with open(file, "r") as f:
          add_lines = [
              "O "
              + line.strip().split("\t")[0]
              + " O"
              + "\t"
              + "<s> "
              + line.strip().split("\t")[1]
              + " </s>"
              for line in f.readlines()
          ]
          f1.write("\n".join(add_lines))
  
label_desc: Use image node_id 1 for calling a global function with example usage: add_start_end_token(file) without return types