Building a Large Annotated Corpus of English: The Penn Treebank
Marcus et al., 1993, Building a Large Annotated Corpus of English (Computational Linguistics)
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2.2 The POS tagset
- Give the Penn Treebank verb tags.
VB base form (infinitive, imperative) VBD past tense VBG gerund or present participle VBN past participle VBP non-3rd person singular present VBZ 3rd person singular present MD modal - Marcus et al., 1993, Building a Large Annotated Corpus of English (Computational Linguistics), §2.2
- Give the Penn Treebank noun and pronoun tags.
NNP, NNPS and PRP replaced earlier NP, NPS and PP to avoid confusion with the phrase labels NP and PP.NN singular or mass noun NNS plural noun NNP singular proper noun NNPS plural proper noun PRP personal pronoun PRP$ possessive pronoun WP wh-pronoun - Marcus et al., 1993, Building a Large Annotated Corpus of English (Computational Linguistics), §2.2
- How are contractions and the possessive ’s tokenized in the Penn Treebank?Split into morphemes, each tagged separately (no compound tags as in Brown’s PPSS+BEM): children’s → children/NNS ’s/POS; won’t → wo/MD n’t/RB.
- Marcus et al., 1993, Building a Large Annotated Corpus of English (Computational Linguistics), §2.2
Source
- Mitchell P. Marcus, Beatrice Santorini and Mary Ann Marcinkiewicz. 1993. Building a Large Annotated Corpus of English: The Penn Treebank. In Computational Linguistics, pp. 313–330. https://aclanthology.org/J93-2004/