code: def unroll_list(list_):
      list_ = [sub_el for el in list_ for sub_el in el]
      return list_
  
imports: import json
  import os
  from collections import Counter
  from datasets import load_from_disk
  from tqdm import tqdm
label_desc: Use image node_id 1 for calling a global function with example usage: unroll_list(list_) and returns: list_