Is it adequate to use the link grammar parser to do POS tagging? How is the performance when it comes to informal english with a little of my country's lingo?
Does the link grammar parser also performs a subject-object relationship identification?
Doing POS tagging is the first step towards NER right?
The link grammar parser provides some deep grammar information like connection between nouns and various kinds of post-noun modifiers (see M and many other).
However postprocess the resulting parse graph can be tedious, if you are only interested in tagging and/or NER, take a look at:
http://nlp.stanford.edu/software/tagger.shtml
http://nlp.stanford.edu/ner/index.shtml
Link grammar and the Stanford parser are two of the best current parser for English. You should be able to get descent results.
