(This web page is permanently under construction.)
Penn Treebank Project
The Penn Treebank Project
The Penn Treebank Project annotates naturally-occuring text for linguistic
structure. Most notably, we produce skeletal parses showing rough
syntactic and semantic information -- a bank of linguistic
We also annotate text with
and for the Switchboard corpus of telephone conversations,
We are located in the
Computer and Information Science Department
University of Pennsylvania.
All data produced by the Treebank is released through the
Linguistic Data Consortium.
Descriptions and samples of annotated corpora:
Wall Street Journal |
The Brown Corpus |
searches are now possible for those with
LDC Online access.
Frequently Asked Questions (FAQs)
NP heads and Base NPs in Treebank II bracketing
Annotation Style Manuals
Treebank I bracketing was used until 12/92.
Treebank II bracketing is designed to allow the extraction of
simple predicate-argument structure.
Dysfluency annotation used for Switchboard corpus only
Treebank Releases on CD
Preliminary Release, Version 0.5 CDROM, 1992
Release 2 CDROM, 1995
overview of the project (before Treebank II style), Computational
Linguistics, vol. 19, 1993.
predicate-argument bracketing (a.k.a. Treebank II), ARPA '94.
- Principal Investigator:
- Mitchell Marcus
- Project Administrator:
- Ann Taylor
- Programmer/Data Manager:
- Robert MacIntyre
- Ann Bies, Constance Cooper, Mark Ferguson, Alyson Littman
Links to other sites
Project (Automatic Mapping Among Lexico-Grammatical Annotation Model)
(Centre for Computer Analysis of Language and Speech)
The LDC's Linguistic
Annotation Page Tools and formats for creating linguistic
This web page is maintained by
Last change: $Date: 1999/02/02 17:57:13 $ UTC.