This is a revised trimmed-down version of the main README file that
accompanied the Penn Treebank Release 2 CDROM, which featured a
million words of 1989 Wall Street Journal material annotated in
Treebank II style.  Portions of that README file are being included
here with Penn Treebank Release 3 in order to provide additional
information about material that was present in the earlier release.

The Treebank II bracketing style, which is designed to allow the
extraction of simple predicate-argument structure, is described in
doc/arpa94 and the new bracketing style manual (in doc/manual/).  In
addition, there is a small sample of ATIS-3 material, also annotated
in Treebank II style.

		      INVENTORY and DESCRIPTIONS

The directory structure of this release is similar to the previous release.

doc/                    --Documentation.
			This directory contains information about who
			the annotators of the Penn Treebank are and
			what they did as well as LaTeX files of the
			Penn Treebank's Guide to Parsing and Guide to
			Tagging. 

parsed/			--Parsed Corpora.
			These are skeletal parses, without part-of-speech
			tagging information.  To reflect the change in
			style from our last release, these files now have
			the extension of .prd.

  atis/  		--Air Travel Information System transcripts.
  April 1994		Approximately 5000 words of ATIS3 material.
			The material has a limited number of sentence
			types.  It was created by Don Hindle's Fidditch and
			corrected once by a human annotator (Grace Kim).

  wsj/			--1989 Wall Street Journal articles.
  November 1993		Most of this material was processed from our      
   -October 1994	previous release using tgrep "T" programs.
			However, the 21 files in the 08 directory and the
			file wsj_0010 were initially created using the
			FIDDITCH parser (partially as an experiment, and
			partly because the previous release of these files
			had significant technical problems).
			                                                  
			All of the material was hand-corrected at least
			once, and about half of it was revised and updated
			by a different annotator.  The revised files are
			likely to be more accurate, and there is some
			individual variation in accuracy.  The file
			doc/wsj.wha lists who did the correction and
			revision for each directory.


tagged/			--Tagged Corpora.

  atis/			--Air Travel Information System transcripts.
  April 1994		The part-of-speech tags were inserted by Ken
			Church's PARTS program and corrected once by a
			human annotator (Robert MacIntyre).
  
  wsj			--'88-'89 Wall Street Journal articles.
  Winter		These files have not been reannotated since the
   -Spring 1990		previous release.  However, a number of technical
			bugs have been fixed and a few tags have been
			corrected.  See tagged/README.pos for details.


The new work in Release 2 was funded by the Linguistic Data Consortium.
Previous versions of this data were primarily funded by DARPA and AFOSR
jointly under grant No. AFOSR-90-006, with additional support by DARPA
grant No. N0014-85-K0018 and by ARO grant No. DAAL 03-89-C0031 PRI.  Seed
money was provided by the General Electric Corporation under grant
No. J01746000.  We gratefully acknowledge this support.

Richard Pito deserves special thanks for providing the tgrep tool, which
proved invaluable both for preprocessing the parsed material and for
checking the final results.

We are also grateful to AT&T Bell Labs for permission to use Kenneth
Church's PARTS part-of-speech labeller and Donald Hindle's Fidditch parser.

Finally, we are very grateful to the exceptionally competent technical
support staff of the Computer and Information Science Department at the
University of Pennsylvania, including Mark-Jason Dominus, Mark Foster, and
Ira Winston.

Portions Copyright (c) Wall Street Journal, University of Pennsylvania