public override void PrepareData()
{
string fileName = "aclImdb_v1.tar.gz";
string url = $"https://storage.googleapis.com/download.tensorflow.org/example_images/flower_photos.tgz";
string data_dir = Path.GetTempPath();
Web.Download(url, data_dir, fileName);
Compress.ExtractGZip(Path.Join(data_dir, fileName), data_dir);
data_dir = Path.Combine(data_dir, "aclImdb_v1");
}