https://github.com/google/sling
https://github.com/google/sling/blob/caspar/doc/guide/pyapi.md#parsing
Linux machine with Python 2.7
sudo pip install http://www.jbox.dk/sling/sling-1.0.0-cp27-none-linux_x86_64.whl
download the pre-trained model:
wget http://www.jbox.dk/sling/sempar.flow