I did sudo pip install -U nltk as suggested by the nltk documentation. However, I am getting the following output: Collecting nltk Downloading nltk-3.0.5.tar.gz (1.0MB) 100% |████████████████████████████████| 1.0MB 516kB/s Collecting six>=1.9.0 (from nltk) Downloading six-1.9.0-py2.py3-none-any.whl Installing collected packages: six, nltk Found existing installation: six 1.4.1 DEPRECATION: Uninsta
