Building a Large Annotated Corpus of English: The Penn Treebank
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In this paper, we review our experience with constructing one such large annotated corpus--the Penn Treebank, a corpus consisting of over 4.5 million words of American English. During the first three-year phase of the Penn Treebank Project (1989-1992), this corpus has been annotated for part-of-speech (POS) information. In addition, over half of it has been annotated for skeletal syntactic structure.
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1993-10-01
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University of Pennsylvania Department of Computer and Information Science Technical Report No. MS-CIS-93-87.