Output generated is different with output in NLTK tutorial - python-3.x

Today I start to learn Python because I need to use NLTK in my assignment. In order to learn it, I follow the tutorial in this site http://www.nltk.org/book/ch01.html. However, when I run the programme in Python interpreter, the output produced is not same with what has been shown in the website and I have no idea on what thing that this output wants to tell me.
(Below is the picture of the output:)
Input: >>> from nltk.book import *
Output (After I hit 'Enter'):
So now my questions are what is the error about and if there is a way to solve it, then what should I need to do?
Thanks for looking into my problem.

This appears to be a known bug with nltk and Python 3. It seems to have been fixed within the past two weeks, but I expect you'll have to wait until there's a release that contains the fix. You could try installing from source.

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