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Say I have the following Penn Tree:
(S (NP-SBJ the steel strike)
(VP lasted
(ADVP-TMP (ADVP much longer)
(SBAR than
(S (NP-SBJ he)
(VP anticipated
(SBAR *?*))))))
.)
What do abbrevations like VP and SBAR etc mean? Where can I find these definitions? What are these abbreviations called?
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JJ adjective 'big' JJR adjective, comparative 'bigger' JJS adjective, superlative 'biggest'
Part-of-speech (POS) tagging is a popular Natural Language Processing process which refers to categorizing words in a text (corpus) in correspondence with a particular part of speech, depending on the definition of the word and its context.
A POS tag (or part-of-speech tag) is a special label assigned to each token (word) in a text corpus to indicate the part of speech and often also other grammatical categories such as tense, number (plural/singular), case etc. POS tags are used in corpus searches and in text analysis tools and algorithms.
Those are the Penn Treebank tags, for example, VP means "Verb Phrase". The full list can be found here
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