Run

text4.dispersion_plot(["citizens", "democracy", "freedom", "duties", "America"])

but it says,

The plot function requires the matplotlib package.See

http://matplotlib.sourceforge.net

Solaris installation: Still at 45%. SUNWwbapi

OK, so nltk.download() will actually bring up a GUI downloader.

Did not notice this, and waited for hour.

Running Solaris 10 u9 installation. The progress bar has stayed at 45% for a very long time

NIF stands for Native Implementation Function in Erlang