Stanford Parser and NLTK

As both tools changes rather quickly and the API might look very different 3-6 months later. Please treat the following answer as temporal and not an eternal fix. Firstly, one must note that the Stanford NLP tools are written in Java and NLTK is written in Python. The way NLTK is interfacing the tool is through the call the Java tool through the command line interface. Secondly, the NLTK API to the Stanford NLP tools have changed quite a lot since the version 3.1.