code: def build(opt):
      version = "v6.0"
      dpath = os.path.join(opt["datapath"], "rephrase_sentences")
  
      if not build_data.built(dpath, version):
          print("[building data: " + dpath + "]")
          if build_data.built(dpath):
              # An older version exists, so remove these outdated files.
              build_data.remove_dir(dpath)
          build_data.make_dir(dpath)
  
          # Download the data.
          fnames = [
              "rephrase_sentences_train_0703.txt",
              "rephrase_sentences_valid_0703.txt",
              "rephrase_sentences_test_0703.txt",
              "choose_sentence_train.txt",
              "choose_sentence_valid.txt",
              "choose_sentence_test.txt",
          ]
          for fname in fnames:
              url = (
                  "http://parl.ai/downloads/projects/rephrase_sentences/"
                  + fname
              )
              build_data.download(url, dpath, fname)
  
          # Mark the data as built.
          build_data.mark_done(dpath, version)
  
label_desc: Use image node_id 1 for calling a global function with example usage: build(opt) without return types