static O unstructureGZFile(File f) ctex {
  InputStream fis = new FileInputStream(f);
  try {
    GZIPInputStream gis = newGZIPInputStream(fis);
    InputStreamReader reader = new InputStreamReader(gis, "UTF-8");
    BufferedReader bufferedReader = new BufferedReader(reader);
    ret unstructure_tok(javaTokC_noMLS_onReader(bufferedReader), false, null);
  } finally {
    fis.close();
  }
}