Acabo de comenzar a usar un etiquetador de parte del discurso, y estoy enfrentando muchos problemas.

Inicié el etiquetado de POS con lo siguiente:

import nltk
text=nltk.word_tokenize("We are going out.Just you and me.")

Cuando quiero imprimir'text', sucede lo siguiente:

print nltk.pos_tag(text)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "F:\Python26\lib\site-packages\nltk\tag\__init__.py", line 63, in pos_tag
tagger = nltk.data.load(_POS_TAGGER)
File "F:\Python26\lib\site-packages\nltk\data.py", line 594, in load
resource_val = pickle.load(_open(resource_url))
File "F:\Python26\lib\site-packages\nltk\data.py", line 673, in _open
 return find(path).open()
 File "F:\Python26\lib\site-packages\nltk\data.py", line 455, in find
   raise LookupError(resource_not_found)`  
LookupError:
 Resource 'taggers/maxent_treebank_pos_tagger/english.pickle' not
 found.  Please use the NLTK Downloader to obtain the resource:

>>> nltk.download().

 Searched in:
    - 'C:\\Documents and Settings\\Administrator/nltk_data'
    - 'C:\\nltk_data'
    - 'D:\\nltk_data'
    - 'E:\\nltk_data'
    - 'F:\\Python26\\nltk_data'
    - 'F:\\Python26\\lib\\nltk_data'
    - 'C:\\Documents and Settings\\Administrator\\Application Data\\nltk_data'

Solíanltk.download() Pero no funcionó