Thank you, I'm glad you you enjoyed it - I hope to have one on more advanced topics at some point. If you are looking for a named entity extractor sample, I have a sample from my talk on github: https://github.com/shanbady/NLTK-Boston-Python-Meetup/blob/m...

The sample uses the built-in named entity tagger but nltk also has support for leveraging the Stanford named entity tagger: http://www.nltk.org/api/nltk.tag.html#module-nltk.tag.stanfo...