Question: Using Python, Read text 7 from nltk . 1 ) how many unique tokens in the Wall Street Journal? 2 ) how many unique stems

Using Python, Read text7 from nltk.
1) how many unique tokens in the Wall Street Journal?
2) how many unique stems using Lancaster stemmer?
3) Which stem appears the most? What are its variations?
4) Which stem has the most variations of words? What are its variations?

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