Documentation is inconsistent about whether PyTorch or Tensorflow was used

[gabbard]

The README says:

We developed the system with Python 3.6. You also need pytorch. We used 0.4.0. You could also use Keras with TensorFlow, but we did not test the final performance on Keras. We used Keras 2.1.5 and TensorFlow 1.7.0

This is confusing - at first it seems to say you used pytorch and didn't try Keras with Tensorflow, but then it says you did use Keras with Tensorflow?

[ylmeng]

Hi. We did use keras with tf, but did not do the final evaluation with it. It may work but the quality is uncertain.