The NLP modules are generally found in the "Lingua" namespace - most of the various part-of-speech taggers, lemmatizers, stemmers etc. have a Perl implementation.

Some examples:
Lingua::EN::Tagger
Lingua::TreeTagger
Lingua::FreeLing3
Lingua::EN::SENNA
Lingua::CollinsParser
Lingua::BrillTagger

If you are going to do further NLP type analysis they are worth looking into.

In reply to Re^3: Problem with a text-parsing regex by tangent
in thread Problem with a text-parsing regex by ibm1620

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