code: def max_mwt_length(filenames):
      max_len = 0
      for filename in filenames:
          with open(filename) as f:
              d = json.load(f)
              max_len = max(
                  [max_len] + [len(" ".join(x[0][1])) for x in d]
              )
      return max_len
  
label_desc: Use image node_id 1 for calling a global function with example usage: max_mwt_length(filenames) and returns: max_len