Natural Language ToolKit (www.nltk.org). What is nltk? A tool which allows you to do NLP stuff such as Finding similar words in context, POS tagging etc.

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Presentation transcript:

Natural Language ToolKit (

What is nltk? A tool which allows you to do NLP stuff such as Finding similar words in context, POS tagging etc. We’ll be using nltk to write custom CFGs for the set of given sentences and produce parse trees for those sentences to check the accuracy of the grammar.

Download and Install (On your local machine) installation for windows TarBall for Linux.dmg for Mac

NLTK is installed on the cs4705 account To use this, add this line in the $HOME/.profile file in your CS account – export PYTHONPATH=/home/cs4705/nltk-2.0b5 Then, either restart the shell or do /home/cs4705 $. $HOME/.profile

Bringing up the GUI for Chart Parser nltk.app.chartparser()

Loading the grammar

Stepping throughthe parse To view the parse step by step, check the “Step” checkbox in the lower right corner. To view the final parse without stepping through, uncheck “Step”