What is the full list of category labels for the default Named Entity classifier

Hao

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Jan 7, 2012, 12:47:13 AM1/7/12

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Hi everyone,

I am applying the default Named Entity classifier (nltk.ne_chunk) to
some documents. How can I get a full list the category labels (like
PERSON, ORGANIZATION, and GPE) used by this classifier? Thanks a lot.

Hao

Steven Bird

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Jan 7, 2012, 1:05:47 AM1/7/12

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From a quick look at the pickled model file, they are:
FACILITY, GPE, GSP, LOCATION, ORGANIZATION, PERSON

(There's no support for discovering this using NLTK functionality, sorry.)

By the way, note that the new version of NLTK includes an interface to
the Stanford Named Entity Recognizer.
http://nltk.github.com/api/nltk.tag.html#nltk.tag.stanford.NERTagger

-Steven Bird

Hao

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Jan 7, 2012, 5:57:51 PM1/7/12

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Thanks. This is really helpful.

hao

On Jan 6, 10:05 pm, Steven Bird <stevenbi...@gmail.com> wrote:

Rami Al-Rfou'

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Jan 8, 2012, 8:30:18 PM1/8/12

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If you are using the stanford NER classifiers, the labels will change depending on the model you are using, for more information
http://nlp.stanford.edu/software/CRF-NER.shtml#Models