Paper with more information: "Unsupervised Abstractive Sentence Summarization using Length Controlled Variational Autoencoder" https://arxiv.org/abs/1809.05233
python train_vae.py TRAIN_FILE data/train/train_example.txt -DEV_DIR data/test/example -VOCAB_FILE data/train/vocab.txt -OUTPUT_DIR outputs/example1 -CONFIG configs/example.yaml
python summarize.py outputs/example1/ data/test/example -output_len 18 -batch_size 16
python sampling.py outputs/example1/ sample -output_len 18